Afghanistan: US forces attacked in Nangarhar

A convoy of US and Afghan forces was attacked in Afghanistan's Nangarhar province on Monday.

According to a NATO press release, the convoy returned fire in self-defense and there were no US casualties.

The attack comes just days after three US soldiers were killed during a joint US-Afghan military operation in the same region.The soldiers were killed in an apparent insider attack.

Taliban spokesman Zabiullah Mujahid said the terrorist group claimed responsibility for the attack.

Both attacks occurred in the Achin District, where US and Afghan troops have been carrying out an offensive against a local affiliate of ISIS.

US and coalition casualties in Afghanistan have been falling dramatically since the Afghan government assumed responsibility for combat operations in 2014.

But in late April, two US service members were killed and another wounded while conducting a joint raid in the Achin District, in an operation targeting ISIS-K, the terror group's Afghanistan affiliate.

Achin is the primary base of operations for ISIS in Afghanistan and has been the site of multiple joint US-Afghan counterterrorism missions.

The district is also where the US dropped its most powerful non-nuclear bomb, killing close to 100 ISIS fighters, according to Afghan officials.