A car bomb scene is seen after an explosion in front of the government's Southern Border Provinces Administrative Centre in Yala, Thailand March 17, 2020. REUTERS/Surapan Boonthanom

Security personnel inspect the site of a car bomb after if exploded in front of the government's Southern Border Provinces Administrative Centre in Yala, Thailand March 17, 2020. REUTERS/Surapan Boonthanom

Security personnel inspect the site of a car bomb after if exploded in front of the government's Southern Border Provinces Administrative Centre in Yala, Thailand March 17, 2020. REUTERS/Surapan Boonthanom

Colombia's President Ivan Duque walks next to Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, as they take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum, Defense Minister Carlos Holmes Trujillo, U.S. Secretary of State Mike Pompeo and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum, Defense Minister Carlos Holmes Trujillo, U.S. Secretary of State Mike Pompeo and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque, U.S. Secretary of State Mike Pompeo, Venezuelan opposition leader Juan Guaido, Colombia's Vice President Marta Lucia Ramirez and Colombia's Foreign Minister Claudia Blum lay a wreath in honour of the cadets killed in the 2019 car bomb attack at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque kneels next to U.S. Secretary of State Mike Pompeo, Venezuelan opposition leader Juan Guaido, Colombia's Vice President Marta Lucia Ramirez and Colombia's Foreign Minister Claudia Blum as they lay a wreath in honour of the cadets killed in the 2019 car bomb attack at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Relatives of the cadets killed in the 2019 car bomb attack, attend a ceremony at the Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Relatives of the cadets killed in the 2019 car bomb attack, attend a ceremony at the Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Colombia's President Ivan Duque and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, greet families of the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

U.S. Secretary of State Mike Pompeo greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

U.S. Secretary of State Mike Pompeo greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez

Attendees hold signs at a giant inflatable depicting Cristina Kirchner, as they attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The signs read as "The signs read "Justice and Nisman" and "Nisman was killed by CFK(Cristina Fernandez se Kirchner)". REUTERS/Mariana Greif

Attendee poses for pictures with giant inflatables depicting Cristina Kirchner, as they attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

Attendee poses for pictures with a giant inflatable depicting Cristina Kirchner with a puppet of Alberto Fernandez, as they attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

People pose for pictures with a giant inflatable depicting Cristina Kirchner with a puppet of Alberto Fernandez, as they attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020.REUTERS/Mariana Greif

People attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020.REUTERS/Mariana Greif

Former Argentine security minister Patricia Bullrich (C) and Alberto Nisman's mother Sara Garfunkel (L) attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

People hold a placard and a cross as they attend the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

Sara Garfunkel, mother of the late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, attends the commemorations of the fifth anniversary of his death in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020.REUTERS/Mariana Greif

Former Argentine security minister Patricia Bullrich attends the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

A man holds a placard of Alberto Nisman as he attends the commemorations of the fifth death anniversary of late state prosecutor Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads as "Don’t forget me, she sent someone to kill me, because I was reporting her." REUTERS/Mariana Greif

Former Argentine security minister Patricia Bullrich attends the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

Sara Garfunkel, mother of the late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, attends the commemorations of the fifth anniversary of his death in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020.REUTERS/Mariana Greif

Sara Garfunkel, mother of the late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, attends the commemorations of the fifth anniversary of his death in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads as "Justice you will seek! It wasn’t suicide it was an assassination." REUTERS/Mariana Greif

People attends the commemorations of the fifth death anniversary of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads as "While we remember (Nisman), this will continue". REUTERS/Mariana Greif

People hold up a picture of late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack at a Jewish community center in Buenos Aires, during commemorations of the fifth anniversary of his death, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

Sara Garfunkel, mother of the late state prosecutor Alberto Nisman, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, attends the commemorations of the fifth anniversary of his death in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

Sara Garfunkel, mother of the late state prosecutor Alberto Nisman's attends the commemorations of the fifth anniversary of his death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

A demonstrator holds a sign during the commemorations of the fifth anniversary of Alberto Nisman's death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads: 'Truth and justice'. REUTERS/Mariana Greif

Demonstrators hold signs during the commemorations of the fifth anniversary of Alberto Nisman's death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The signs read: 'You will seek justice. It was not suicide, it was an assassination'. REUTERS/Mariana Greif

Demonstrators hold signs during the commemorations of the fifth anniversary of Alberto Nisman's death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. REUTERS/Mariana Greif

A demonstrator holds a sign during the commemorations of the fifth anniversary of Alberto Nisman's death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads: 'First heads, then Nisman'. REUTERS/Mariana Greif

People set up a giant puppet with a sign as they attend the commemorations of the fifth anniversary of Alberto Nisman's death, the lead investigator into the car bomb attack that killed 85 people at a Jewish community center in Buenos Aires, in Plaza Vaticano, Buenos Aires, Argentina, January 18, 2020. The sign reads: 'It wasn't suicide, it was an assassination. You will seek justice'. REUTERS/Mariana Greif

The wreckage of a car is seen at the scene of a bomb explosion at the Maka al-Mukarama street in Mogadishu, Somalia January 8, 2020. REUTERS/Feisal Omar

Policemen assess the wreckage of a car at the scene of a bomb explosion at the Maka al-Mukarama street in Mogadishu, Somalia January 8, 2020. REUTERS/Feisal Omar

The wreckage of a car is seen at the scene of a bomb explosion at the Maka al-Mukarama street in Mogadishu, Somalia January 8, 2020. REUTERS/Feisal Omar

The wreckage of a car is seen at the scene of a bomb explosion in Mogadishu, Somalia January 8, 2020. REUTERS/Feisal Omar

Somali policemen assess the wreckage of a car, destroyed at the scene of a bomb explosion in Mogadishu, Somalia January 8, 2020. REUTERS/Feisal Omar

Somali women hold a photograph of a child injured at the car bomb explosion at the Afgoye junction, as they participate in a protest against al-Shabaab militia outside the General Kahiye Police Academy in Mogadishu, Somalia January 2, 2020. REUTERS/Feisal Omar

Somali women hold a portrait of Turkish President Tayyip Erdogan as they participate in a protest against al-Shabaab militia over the car bomb explosion at the Afgoye junction, outside the General Kahiye Police Academy in Mogadishu, Somalia January 2, 2020. REUTERS/Feisal Omar

A Somali woman wears a white band on her head as she participates in a protest against al-Shabaab militia over the car bomb explosion at the Afgoye junction, outside the General Kahiye Police Academy in Mogadishu, Somalia January 2, 2020. REUTERS/Feisal Omar TPX IMAGES OF THE DAY

Somali women participate in a protest against al-Shabaab militia over the car bomb explosion at the Afgoye junction, outside the General Kahiye Police Academy in Mogadishu, Somalia January 2, 2020. REUTERS/Feisal Omar

Gududo Hassan Hussein, a survivor of the car bomb explosion at the Afgoye junction, reacts during a protest against al-Shabaab militia outside the General Kahiye Police Academy in Mogadishu, Somalia January 2, 2020. REUTERS/Feisal Omar

Somali farmer Abdi Abukar Hassan and father of Mohamed Abdul, who was injured in the car bomb attack at the Afgoye junction, sits with his son Sadak Abdi and daughter Khadija Abdi, during a Reuters interview outside his house in Mogadishu, Somalia January 1, 2020. REUTERS/Feisal Omar

Kadija Mohamed Sidow, grandmother of Mohamed Abdul, who was injured in the car bomb attack at the Afgoye junction, is seen during a Reuters interview at her house in Mogadishu, Somalia January 1, 2020. REUTERS/Feisal Omar

Somali farmer Abdi Abukar Hassan and father of Mohamed Abdul, who was injured in the car bomb attack at the Afgoye junction, is seen during a Reuters interview outside his house in Mogadishu, Somalia January 1, 2020. REUTERS/Feisal Omar

Somalia's President Mohamed Abdullahi Mohamed visits a child injured in the car bomb explosion at the Afgoye junction, who waits to be transported on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

A Somali girl injured in the car bomb explosion at the Afgoye junction is carried on a stretcher to be evacuated for specialised treatment by a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

A Turkish worker sits in an ambulance next to a coffin of his colleague killed in the car bomb explosion at the Afgoye junction, as they wait for transportation on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

A Somali girl injured in the car bomb explosion at the Afgoye junction is carried on a stretcher as she is to be evacuated for specialised treatment by a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, December 29, 2019. REUTERS/Feisal Omar

Turkish workers carry the coffin of their colleague killed in the car bomb explosion at the Afgoye junction, for transportation on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

Coffins with the dead bodies of Turkish workers killed in the car bomb explosion at the Afgoye junction, are seen on a Turkish military cargo plane as they await to be transported at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

Turkish workers carry the coffin of their colleague killed in the car bomb explosion at the Afgoye junction, for transportation on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

Turkish workers pray near the coffins of their colleagues killed in the car bomb explosion at the Afgoye junction, as they await to be transported on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

Turkish workers carry the coffin of their colleague killed in the car bomb explosion at the Afgoye junction, for transportation on a Turkish military cargo plane at the Aden Abdulle International Airport in Mogadishu, Somalia December 29, 2019. REUTERS/Feisal Omar

A Turkish military cargo plane prepares to evacuate victims of the car bomb explosion at the Afgoye junction, for specialised treatment, at the Aden Abdulle International Airport in Mogadishu, December 29, 2019. REUTERS/Feisal Omar