Members of the media attend a news conference by Venezuela's chief prosecutor Tarek William Saab a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Venezuela's chief prosecutor Tarek William Saab holds a news conference a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Venezuela's chief prosecutor Tarek William Saab holds a news conference a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Venezuela's chief prosecutor Tarek William Saab holds a news conference a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Venezuela's chief prosecutor Tarek William Saab shows a document during a news conference a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Venezuela's chief prosecutor Tarek William Saab arrives for a news conference a day after Venezuela's government said it foiled an attempted incursion by "terrorist mercenaries" from Colombia, Caracas Venezuela May 4, 2020. REUTERS/Manaure Quintero

Members of the Bolivarian National Guard walk on a breakwater, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Member of the Bolivarian National Guard walks on a breakwater, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Members of the special forces unit watch an empty boat at the shore, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Venezuelan security forces boats are seen, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Members of the special forces unit are seen at a shore, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Members of the special forces unit watch an empty boat at a shore, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero TPX IMAGES OF THE DAY

Venezuelan security forces boats are seen, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

A man watches a Venezuelan security forces boat, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

A member of the La Guaira state police gestures at a road checkpoint, after Venezuela's government announced a failed "mercenary" incursion, in Macuto, Venezuela, May 3, 2020. REUTERS/Manaure Quintero

Former mercenary Michael "Mad Mike" Hoare's coffin is carried by his sons and former military colleagues during his funeral service in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

Former mercenary Michael "Mad Mike" Hoare's coffin is carried by his sons and former military colleagues during his funeral service in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

Former mercenary Michael "Mad Mike" Hoare's coffin is carried by his sons and former military colleagues during his funeral service in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

An attendee holds the program from the funeral service of former mercenary Michael "Mad Mike" Hoare in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

Former mercenary Michael "Mad Mike" Hoare's coffin is carried by his sons and former military colleagues during his funeral service in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

Former mercenary Michael "Mad Mike" Hoare's coffin is carried by his sons and former military colleagues during his funeral service in Durban, South Africa, February 11, 2020. REUTERS/Rogan Ward

People walk past the Sogaz International Medical Centre, which treats injured Russian mercenaries, in Saint Petersburg, Russia, January 6, 2020. Picture taken January 6, 2020. REUTERS/Anton Vaganov

People walk past the Sogaz International Medical Centre, which treats injured Russian mercenaries, in Saint Petersburg, Russia, January 6, 2020. Picture taken January 6, 2020. REUTERS/Anton Vaganov

A sign is seen outside the Sogaz International Medical Centre, which treats injured Russian mercenaries, in Saint Petersburg, Russia, January 6, 2020. Picture taken January 6, 2020. REUTERS/Anton Vaganov

People walk past the Sogaz International Medical Centre, which treats injured Russian mercenaries, in Saint Petersburg, Russia, January 6, 2020. Picture taken January 6, 2020. REUTERS/Anton Vaganov

People walk past the Sogaz International Medical Centre, which treats injured Russian mercenaries, in Saint Petersburg, Russia, January 6, 2020. Picture taken January 6, 2020. REUTERS/Anton Vaganov

People attend a conference of military veterans on decision to ask the International Criminal Court (ICC) to investigate Russia's secret deployment of civilian contractors in Syria, Ukraine and Africa, in Moscow, Russia November 18, 2018. Picture taken November 18, 2018. REUTERS/Shamil Zhumatov

A politician Viktor Alksnis speaks at a conference of military veterans on decision to ask the International Criminal Court (ICC) to investigate Russia's secret deployment of civilian contractors in Syria, Ukraine and Africa, in Moscow, Russia November 18, 2018. Picture taken November 18, 2018. REUTERS/Shamil Zhumatov

A politician Viktor Alksnis attends a conference of military veterans on decision to ask the International Criminal Court (ICC) to investigate Russia's secret deployment of civilian contractors in Syria, Ukraine and Africa, in Moscow, Russia November 18, 2018. Picture taken November 18, 2018. REUTERS/Shamil Zhumatov

Yevgeny Shabayev, a paramilitary Cossack group leader, speaks during an interview with Reuters in Moscow, Russia November 13, 2018. Picture taken November 13, 2018. REUTERS/Shamil Zhumatov

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi (C) and his supporters react as riot police fire teargas canisters at them as they walk to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe/File Photo

Riot police hold their position as they attempt to disperse supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state in Lubumbashi, the capital of Katanga province, May 13, 2016. REUTERS/Kenny Katombe

Supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi hold placards as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Riot police hold their position as they attempt to disperse supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state in Lubumbashi, the capital of Katanga province, May 13, 2016. REUTERS/Kenny Katombe

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF DEATH AND INJURY Abraham Soriano, brother to Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi (not in the picture) bleeds after he was injured when riot police fired teargas canisters at them as they escorted Katumbi to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province, May 13, 2016. REUTERS/Kenny Katombe

Riot police hold their position as they attempt to disperse supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi and his supporters react as riot police fire teargas at them as they walk to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Riot police hold their position as they attempt to disperse supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi (C) and his supporters react as riot police fire teargas canisters at them as they walk to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi (C) stands with his supporters after riot police fired teargas canisters at them as they walked to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi (C) and his supporters react as riot police fire teargas canisters at them as they walk to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi and his supporters react as riot police fire teargas canisters at them as they walk to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi shield him as riot police fire teargas at them as they escort him to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 13, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi is escorted by his supporters as he walks to the prosecutor's office over government allegations he hired mercenaries, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 11, 2016. REUTERS/Kenny Katombe

Supporters of Democratic Republic of Congo's opposition Presidential candidate Moise Katumbi gather outside the prosecutor's office where he was questioned over government allegations he hired mercenaries, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 11, 2016. REUTERS/Kenny Katombe

Democratic Republic of Congo's opposition presidential candidate Moise Katumbi (C) waves to his supporters as he walks to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 9, 2016. REUTERS/Kenny Katombe TPX IMAGES OF THE DAY

Democratic Republic of Congo's opposition presidential candidate Moise Katumbi (C) is escorted by his supporters as he walks to the prosecutor's office over government allegations he hired mercenaries in a plot against the state, in Lubumbashi, the capital of Katanga province of the Democratic Republic of Congo, May 9, 2016. REUTERS/Kenny Katombe

Demonstrators hold up a banners that read "Out mercenary, Chile repudiates you" (L) and "(Nicolas) Maduro (Venezuela's) President" during a protest against Henrique Capriles, Venezuela's opposition leader and governor of Miranda state in in Santiago, July 18, 2013. Capriles is in Chile as part of a personal visit to meet with several Chilean politicians. REUTERS/Ivan Alvarado (CHILE - Tags: POLITICS CIVIL UNREST)

A group of men from the former Soviet Union walk out at the end of their appeal hearing at Libya's Supreme Military Court in Tripoli May 29, 2013. A Libyan military court last year handed down long prison terms to the men accused of serving as mercenaries for ousted leader Muammar Gaddafi in the 2011 conflict. REUTERS/Ismail Zitouny (LIBYA - Tags: CIVIL UNREST POLITICS CONFLICT)

A group of men from the former Soviet Union are seen behind bars during an appeal hearing at Libya's Supreme Military Court in Tripoli May 29, 2013. A Libyan military court last year handed down long prison terms to the men accused of serving as mercenaries for ousted leader Muammar Gaddafi in the 2011 conflict. REUTERS/Ismail Zitouny (LIBYA - Tags: CIVIL UNREST POLITICS CONFLICT)

A group of men from the former Soviet Union are seen behind bars during an appeal hearing at Libya's Supreme Military Court in Tripoli May 29, 2013. A Libyan military court last year handed down long prison terms to the men accused of serving as mercenaries for ousted leader Muammar Gaddafi in the 2011 conflict. REUTERS/Ismail Zitouny (LIBYA - Tags: POLITICS CONFLICT CIVIL UNREST)

An appeal hearing for a group of men from the former Soviet Union (R) gets underway at Libya's Supreme Military Court in Tripoli May 29, 2013. A Libyan military court last year handed down long prison terms to the men accused of serving as mercenaries for ousted leader Muammar Gaddafi in the 2011 conflict. REUTERS/Ismail Zitouny (LIBYA - Tags: CRIME LAW CONFLICT POLITICS)

Opposition conservative Nationalist Republican Alliance party (ARENA) congressman Roberto D'Aubuisson attends a news conference in San Salvador April 8, 2013. According to local media, D'Aubuisson said on Monday that the accusations of Venezuelan acting President Nicolas Maduro, who said foreign mercenaries had entered from Central America with plans to spread violence and sabotage the electricity grid, were a smokescreen. REUTERS/ Ulises Rodriguez (EL SALVADOR - Tags: POLITICS)

Opposition conservative Nationalist Republican Alliance party (ARENA) congressman Roberto D'Aubuisson attends a news conference in San Salvador April 8, 2013. According to local media, D'Aubuisson said on Monday that the accusations of Venezuelan acting President Nicolas Maduro, who said foreign mercenaries had entered from Central America with plans to spread violence and sabotage the electricity grid, were a smokescreen. REUTERS/Ulises Rodriguez (EL SALVADOR - Tags: POLITICS)

A Mexican pro-Cuba activist holds a sign reading "Yoani is not Cuban, is a mercenary" outside the Justice Committee of Senate as Cuba's best-known dissident blogger Yoani Sanchez holds a news conference inside, in Mexico City March 12, 2013. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS CIVIL UNREST)

The population of Tai collect water distributed by the United Nations peacekeepers in western Ivory Coast near the border with Liberia, June 18, 2012. The area has been hit by a series of attacks in recent weeks, killing at least 22 people, including seven United Nations peacekeepers. Ivory Coast has said the attacks were carried out by Liberian mercenaries and pro-former president Laurent Gbagbo Ivorian militias who crossed over from Liberia. REUTERS/Luc Gnago (IVORY COAST - Tags: CIVIL UNREST MILITARY SOCIETY POLITICS CONFLICT)

United Nation peacekeepers prepare to distribute water from their water truck to the population of Tai, in western Ivory Coast near the border with Liberia, June 18, 2012. The area has been hit by a series of attacks in recent weeks, killing at least 22 people, including seven United Nations peacekeepers. Ivory Coast has said the attacks were carried out by Liberian mercenaries and pro-former president Laurent Gbagbo Ivorian militias who crossed over from Liberia. REUTERS/Luc Gnago (IVORY COAST - Tags: CIVIL UNREST MILITARY SOCIETY POLITICS CONFLICT)

A United Nations peacekeepers soldier prepare to distribute water to the population of Tai, in the western Ivory Coast near the border with Liberia, June 18, 2012. The area has been hit by a series of attacks in recent weeks, killing at least 22 people, including seven United Nations peacekeepers. Ivory Coast has said the attacks were carried out by Liberian mercenaries and pro-former president Laurent Gbagbo Ivorian militias who crossed over from Liberia. REUTERS/Luc Gnago (IVORY COAST - Tags: CIVIL UNREST MILITARY SOCIETY POLITICS CONFLICT)

Losseni Fofana of the Ivory Coast Republican forces (FRCI) and commander of the military operation in the Tai area, stands with his men during a patrol on the road to Para village, in the western Tai area near Ivory Coast's border with Liberia, June 17, 2012. The area has been hit by a series of attacks in recent weeks, killing at least 22 people, including seven United Nations peacekeepers. Ivory Coast has said the attacks were carried out by Liberian mercenaries and pro-former president Laurent Gbagbo Ivorian militias who crossed over from Liberia. Picture taken June 17, 2012. REUTERS/Luc Gnago (IVORY COAST - Tags: MILITARY CIVIL UNREST CONFLICT POLITICS)