A US military helicopter has crashed near the American military headquarters in Afghanistan, killing five personnel and injuring seven.
US Central Command said the cause of the crash was unknown and is currently under military investigation.
The helicopter crashed near Bagram Air Base and the troops on board were involved in the latest US operation in Afghanistan, dubbed "Mountain Resolve", it said.
Bagram Air Base, just north of the Afghan capital, is the headquarters for 11,500 US-led troops hunting remnants of the Taliban and al Qaeda network in Afghanistan. Another 5,000 international peacekeepers guard Kabul.
The crash came after two soldiers from the US-led force in Afghanistan were wounded on Sunday when their vehicle hit an explosive device near Shkin, a base close to the Pakistan border.
A statement from the US military said there were reporters at the scene, although none were "seriously injured".
Shkin has been a major trouble spot for the US-led force, with troops coming under frequent and occasionally deadly attack from suspected militants from Afghanistan's ousted Taliban militia and the al Qaeda network it sheltered.
Two years after US forces toppled the Taliban, al Qaeda fighters remain active along the Afghan-Pakistan frontier and the Taliban is regrouping.
Nearly 400 people, including many rebels, have died in violence across the country since early August, much of it blamed on the ousted militia.