Security cameras are seen, and a flag flies outside the consular section of Russia's embassy in London, Britain, March 15, 2018. REUTERS/Hannah McKay 

A flag flies outside the consular section of Russia's embassy in London, Britain, March 15, 2018. REUTERS/Hannah McKay 

A security camera is seen, and a flag flies outside the consular section of Russia's embassy in London, Britain, March 15, 2018. REUTERS/Hannah McKay 

A flag of The Netherlands flies over the Dutch Consulate in Istanbul, Turkey, March 12, 2017. REUTERS/Osman Orsal 

A Turkish flag flies over the Dutch Consulate in Istanbul, Turkey, March 12, 2017. REUTERS/Huseyin Aldemir 

A Turkish flag flies over the Dutch Consulate in Istanbul, Turkey, March 12, 2017. REUTERS/Huseyin Aldemir 

A North Korean flag flutters next to concertina wire at the North Korean embassy in Kuala Lumpur, Malaysia March 9, 2017. REUTERS/Edgar Su 

A Solomon Islands flag (2nd right) waves at the top of a flagpole, which at the bottom reads "Sao Tome", in front of a building housing most of the embassies of Taiwan's official allies, in Taipei, Taiwan, December 23, 2016. REUTERS/J.R. Wu 

Protesters shout in anger from the gallery at Pennsylvania electors after they cast their votes for U.S. President-elect Donald Trump at the Pennsylvania State Capitol in Harrisburg, Pennsylvania, U.S. December 19, 2016. REUTERS/Jonathan Ernst 

Protestors gather outside the chamber as Pennsylvania electors gather to cast their votes for U.S. President-elect Donald Trump at the Pennsylvania State Capitol in Harrisburg, Pennsylvania, U.S. December 19, 2016. REUTERS/Jonathan Ernst 

An anti-Castro protester wearing a t-shirt that reads, "Cuba democracy now", is punched by a supporter of late Cuban revolutionary leader Fidel Castro outside the Cuban Embassy in Madrid, Spain, November 26, 2016. REUTERS/Susana Vera TPX IMAGES OF THE DAY 

Prosecutor Ingrid Isgren from Sweden leaves Ecuador's embassy in London, Britain November 15, 2016. REUTERS/Neil Hall

Prosecutor Ingrid Isgren from Sweden leaves Ecuador's embassy in London, Britain November 15, 2016. REUTERS/Neil Hall

Prosecutor Ingrid Isgren from Sweden leaves Ecuador's embassy in London, Britain November 15, 2016. REUTERS/Neil Hall

Prosecutor Ingrid Isgren from Sweden leaves Ecuador's embassy in London, Britain November 15, 2016. REUTERS/Neil Hall

A police car is parked outside of Ecuador's embassy in London, Britain November 15, 2016. REUTERS/Neil Hall

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY 

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Julian Assange's cat sits at the window of Ecuador's embassy as prosecutor Ingrid Isgren from Sweden interviews Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A police officer stands outside Ecuador's embassy after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Julian Assange's lawyer Jennifer Robertson speaks outside Ecuador's embassy after prosecutor Ingrid Isgren from Sweden arrived to interview her client in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Campaigner Peter Tatchell holds a poster after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Police speak to journalists crowded around the entrance to Ecuador's embassy where Julian Assange is being interviewed by prosecutor Ingrid Isgren from Sweden in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange attaches a poster to railings after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Posters and banners are attached to railings after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange holds a poster after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange holds posters after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange attaches a poster to railings after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Supporters of Julian Assange chat after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Supporters of Julian Assange hold posters after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange holds a poster after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

A supporter of Julian Assange holds a poster after prosecutor Ingrid Isgren from Sweden arrived at Ecuador's embassy to interview him in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Cameras are trained on prosecutor Ingrid Isgren from Sweden as she arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls

Prosecutor Ingrid Isgren from Sweden arrives at Ecuador's embassy to interview Julian Assange in London, Britain, November 14, 2016. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY

Piles on mannequin limbs are seen outside the Russia's embassy in London as part of a protest against military action in Syria, November 3, 2016. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Cem Utkan (2nd R), the Charge d'Affaires at Turkish Embassy in Israel, attends a memorial ceremony marking the 99th anniversary of the Battle of Beersheba, a mounted infantry charge of the Australian 4th Light Horse Brigade as part of the British army's campaign to capture the Holy Land during World War One, at the Turkish soldiers' monument in Beersheba, Israel October 31, 2016. REUTERS/Amir Cohen

Cem Utkan (3rd R), the Charge d'Affaires at Turkish Embassy in Israel, attends a memorial ceremony marking the 99th anniversary of the Battle of Beersheba, a mounted infantry charge of the Australian 4th Light Horse Brigade as part of the British army's campaign to capture the Holy Land during World War One, at the Turkish soldiers' monument in Beersheba, Israel October 31, 2016. REUTERS/Amir Cohen

Cem Utkan, the Charge d'Affaires at Turkish Embassy in Israel, speaks during a memorial ceremony marking the 99th anniversary of the Battle of Beersheba, a mounted infantry charge of the Australian 4th Light Horse Brigade as part of the British army's campaign to capture the Holy Land during World War One, at the Turkish soldiers' monument in Beersheba, Israel October 31, 2016. REUTERS/Amir Cohen

Supporters of Venezuela's President Nicolas Maduro storm into in a session of the National Assembly in Caracas, Venezuela October 23, 2016. REUTERS/Marco Bello TPX IMAGES OF THE DAY

FILE PHOTO - U.S. President Barack Obama and his wife Michelle stand with U.S. ambassador to Cuba, Jeffrey DeLaurentis (L), as they meet with embassy staff in a hotel in Havana March 20, 2016. REUTERS/Carlos Barria/File Photo 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall 

Protesters demonstrate against France's ban of the burkini, outside the French Embassy in London, Britain August 25, 2016. REUTERS/Neil Hall