The Central Intelligence Agency and the U.S. military are conducting extraction operations to evacuate Americans using helicopters and ground troops as the window begins to close for rescuing all people at risk in Afghanistan.

The CIA has launched clandestine operations to rescue Americans in and outside of Kabul in recent days, according to U.S. and other officials. Those operations are using American military helicopters but under the operation and control of the CIA, a typical arrangement in such operations.

The missions are in conjunction with a more limited effort by the U.S. military to rescue Americans stranded inside the city.

The air and ground operations are considered perilous under the current circumstances in the country as the U.S. has begun to assign priority on evacuating Americans over Afghans who are at risk.