(CNN) Turkey has begun the process of returning alleged foreign ISIS fighters to their home countries, starting with an American, a Briton and seven Germans.

Turkey's Interior Ministry said an American who is suspected of being an ISIS fighter was being deported the US, a British suspect to London and seven Germans to Berlin.

The American was initially sent to Greece on Monday, upon his request, according to the Ministry. But Greece refused to accept him, and he was left stranded for several days in a "buffer zone" between the countries, the ministry said.

"Upon the commitment of the USA to issue a travel document, necessary procedures have been initiated to send the foreign terrorist fighter to the USA," the ministry said.

This comes after Turkish President Recep Tayyip Erdogan met with US President Donald Trump at the White House on Wednesday, where they discussed the fight against ISIS, among other things.

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