KABUL, Afghanistan—A military helicopter crashed in a nonhostile incident Sunday at the NATO base in the Afghan capital, Kabul, killing five coalition members and injuring five others, authorities said.

A statement from the Resolute Support Mission didn’t give the nationalities of those killed and injured, all of them NATO personnel. But the British Ministry of Defense said two Royal Air Force members were among those killed when the Puma Mk 2 helicopter crashed while landing at the headquarters of the NATO Resolute Support Mission, which is training Afghan security forces.

The mission statement said the helicopter “crashed due to a nonhostile incident” around 4:15 p.m. Sunday at Camp Resolute Support.

In London, the Ministry of Defense also said a convoy of British military vehicles came under attack earlier Sunday in a separate incident in Kabul, but there were no fatalities.

Gen. Abdul Rahman Rahimi, Kabul’s police chief, said an explosion targeted a NATO military convoy in Kabul, wounding three civilians. He said the blast was aimed at two armored vehicles attached to the NATO Resolute Support mission, damaging one of them. He didn’t specify whether the vehicles were British.