U.S. anti-missile defences intercepted rockets fired at Kabul's airport early on Monday, as the United States flew its core diplomats out of Afghanistan in the final hours of its chaotic withdrawal.

Rocket fire apparently targeting Kabul's international airport struck a nearby neighborhood Monday, the eve of the deadline for American troops to withdraw from the country's longest war after the Taliban takeover of Afghanistan. It wasn't immediately clear if anyone was hurt.

A U.S. official told ABC News that five rockets were fired toward Hamid Karzai International Airport in Kabul on Sunday night.

The official said the U.S. military's anti-projectile C-RAM was fired to intercept the incoming rockets, though it is not yet clear how many it took out, if any.

The rockets did not halt the steady stream of U.S. military C-17 cargo jets taking off and landing at Hamid Karzai International Airport in the Afghan capital. No group immediately claimed responsibility for the attack. Last week, the Islamic State group launched a devastating suicide bombing at one of the airport gates that killed at least 169 Afghans and 13 U.S. service members.

The airport repeatedly has been a scene of chaos in the two weeks since the Taliban blitz across Afghanistan that took control of the country, nearly 20 years after the initial U.S. invasion that followed the Sept. 11 terrorist attacks. But since the suicide bombing, the Taliban have tightened their security cordon around the airfield, with their fighters seen just up to the last fencing separating them from the runway.

In the capital's Chahr-e-Shaheed neighborhood, a crowd quickly gathered around the remains of a four-door sedan used by the attackers, which had what appeared to be six homemade rocket tubes mounted where the backseat should be. The Islamic State group and other militants routinely mount such tubes into vehicles and quietly transport them undetected close to a target.