Afghanistan: At least 21 killed in blast as US prepares to withdraw troops

Scores also injured in the blast in southern city of Pul-e-Alam the day before Pentagon begins to pull out its remaining forces

At least 21 people have been killed and nearly 100 wounded after a car bomb exploded in an Afghan city south of the capital that president Ashraf Ghani has blamed on the Taliban.

Friday's blast occurred in a residential area of Pul-e-Alam, capital of Logar province, as people were breaking their Ramadan fast, and came on the eve of the formal start of the US military's withdrawal from Afghanistan.