Thousands of migrants have set off on foot to the border with Greece after spending the past three days in makeshift camps in the fileds near the Turkish city of Edirne, Bulgaria’s bTV station reported on Friday. Police and gendarmerie forces later halted their advance. The migrants are now closer to Pazarkuke border crossing with Greece. Edirne is located close to Turkey’s borders with EU member states Bulgaria and Greece. Edirne Governor Dursun Ali Sahin said earlier on Friday that the Turkish authorities cannot allow the migrants to cross the border without an invitation from an European country. "If there is any country that is formally inviting you, we would be happy to take you there ourselves by vehicle or by plane. For now, however, no state has invited you," Dursun Ali Sahin told the migrants in a live broadcast on CNNTurk. Turkey, which shares a 900-kilometer border with Syria, has so far spent USD 7.6B caring for 2.2 million Syrian refugees who have fled the civil war in their country, Turkish Deputy Prime Minister Numan Kurtulmus said on Friday.