At least eleven Afghan policemen and army soldiers have been killed and more than 20 civilians wounded when a bomber set off his explosives-laden car near a police checkpoint in Afghanistan’s eastern province of Logar.

At least eleven Afghan policemen and army soldiers have been killed and more than 20 civilians wounded when a bomber set off his explosives-laden car near a police checkpoint in Afghanistan’s eastern province of Logar.

“The bomber detonated his car near a residential area in Azra district of Logar, killing four army soldiers and seven local policemen,” Din Mohammad Darwish, a spokesman for Logar’s governor, said on Tuesday.

While the Taliban is suspected of being behind the attack, it has not yet claimed responsibility for it.

Earlier, Taliban militants fired several rockets toward the Bagram Airbase, the main US base and largest detention facility in Afghanistan. The rocket attack on the heavily fortified site, located 11 kilometers (7 miles) southeast of the city of Charikar in Afghanistan’s Parwan Province, took place late on Friday.

The Taliban militants have stepped up their attacks against the Afghan government, foreign forces and civilians. The group has vowed to escalate the attacks on Afghan forces and US-led troops, their bases, diplomatic missions and vehicle convoys before foreign forces exit the country at the end of 2014.

The US and its allies invaded Afghanistan in 2001 as part of Washington’s so-called war on terror. The offensive removed the Taliban from power, but insecurity remains across the country despite the presence of thousands of US-led troops.

The US-led war in Afghanistan, which has caused record-high civilian and military casualties, has become the longest military conflict in US history.