A large explosion has rocked the Afghan capital, Kabul.

Authorities said the August 10 blast was caused by a suicide car bomber who struck at a checkpoint just outside the Kabul airport.

Afghan Health Ministry spokesman Wahidullah Mayar posted on Twitter that seven civilians, including a child, were killed in the attack.

An Interior Ministry official was quoted as saying, "there are both civilian and security-forces casualties."

The AFP news agency reported numerous ambulances at the scene.

No one immediately claimed responsibility for the attack.

The explosion comes just days after a series of suicide attacks in Kabul left dozens dead and hundreds injured.

The August 7 attacks marked the bloodiest day in Kabul since the withdrawal of most international combat troops at the end of 2014.

Based on reporting by Reuters, dpa, and AFP