French Prime Minister Jean Castex said on Thursday his country will no longer be able to evacuate people from Afghanistan from Friday evening onwards.

“We are going to continue until tomorrow evening,” Castex told RTL radio.

The United States and allies urged people to move away from Kabul airport on Thursday due to the threat of a terror attack by Islamic State militants as Western troops rally to evacuate as many people as possible before an Aug. 31 deadline.

Pressure to complete the evacuations of thousands of foreigners and Afghans who helped Western countries during the 20-year war against the Taliban has intensified, with all U.S. and allied troops due to leave the airport next week.