At least four security guards were killed following a suicide bomber’s attack on a checkpoint in eastern Afghanistan on Monday.
The bomber used a minivan and targeted Afghan guards securing the U.S. military base near the city of Khost, according to General Faizullah Ghyrat, the provincial police chief in the location.
No group immediately claimed responsibility but both Taliban and Haqqani insurgents are known to be active in the area.
The violence comes as the country reels from a massive attack on a military base last Friday.
That attack on the compound of the 209th Corps of the Afghan National Army in northern Balkh province unfolded when gunmen and suicide bombers disguised in army uniforms hit the compound. More than 100 people were killed in the violence. The Taliban claimed responsibility.
The incident led to the resignation of both the Afghan Defense Minister, Abdullah Habibi and the Afghan Army Chief of Staff, Qadama Shah Shahim.
Afghan President Ashraf Ghani accepted the resignations on Monday.
The Associated Press contributed to this report.