The European Asylum Support Office has sent more staff to the Greek island of Lesbos, to help Greece process asylum applicants. On Wednesday, around 70 new EASO staff arrived at a migrant center in Lesbos. Their arrival came after the first group of over 200 migrants were shipped back to Turkey on Monday, under a deal agreed with European Union leaders.

But the process has been postponed because of an increase in asylum requests. More than 3,000 migrants on the island of Lesbos are seeking asylum.

"We are looking into the asylum procedures directive, which allows under two conditions to return people to a country. What are these conditions? There is an article related to what we call 'safe third country' and that is why Turkey comes in and there's another article related to 'first country of asylum', so if a person has been given already protection somewhere, then obviously that's the first country of asylum," EASO spokesperson Jean-Pierre Schembri said.