A powerful car bomb explosion has killed at least 10 people and severely injured 150 others in central Maidan Wardak Province of Afghanistan, security sources say.Local Afghan officials say the deadly explosion happened in Maidan Shahr district where a bomb reportedly went off next to a military base. Local residents and rescue workers said that those injured were rushed to a nearby hospital for medical treatment. Medical sources said the death toll is expected to rise as some of the injured are reported to be in critical condition. No group has yet claimed responsibility, but the Afghan government often blames the Taliban militants for similar attacks in the war-ravaged country. Bomb explosions and improvised explosive devices are by far the most lethal weapons Taliban militants use against Afghan forces, foreign troops, and civilians. In a separate incident, at least 16 people, 12 of them civilians, lost their lives in a US-led airstrike in the eastern Kunar Province. Four children and four women were among the victims. A NATO spokeswoman, however, said only enemy forces were killed in the operation. US-led foreign forces have killed thousands of people, including many civilians, in airstrikes and night-time raids since they invaded the country in 2001. Washington claims that its airstrikes target militants, but local sources say civilians have been the main victims of the attacks. Civilian casualties caused by foreign forces have been a major source of tension between Kabul and Washington. Afghanistan is still struggling with insecurity and violence, years after the presence of US-led foreign forces in the country.