At least 20 people were killed and 38 injured in a powerful blast in front of Kabul's Supreme Court on Tuesday, said reports.
A suicide bomber is said have blown himself up in the court's car park when employees were leaving the building.
There are no reports of any terrorist group having claimed the responsibility for the attack. However, most such attacks in Afghanistan in the past have been traced to Taliban, which is fighting the government there.
The government forces are fighting the Taliban insurgency for over a decade now.