At least 20 people were killed on Tuesday in a bomb blast outside the Supreme Court in the centre of the Afghan capital, government officials said, in what appeared to be the latest in a series of attacks on the judiciary, Reuters reported.
The Ministry of Public Health said at least 20 people were killed, while 41 wounded were taken to Kabul hospitals.
There was no immediate claim of responsibility for the attack, in which police said an apparent suicide bomber targeted Supreme Court employees leaving their offices at the end of the working day.
"When I heard a bang I rushed toward the Supreme Court's parking lot to find my brother who works there," said witness Dad Khuda, adding that he had found his brother alive.
"Unfortunately, several people were killed and wounded."
Reuters reporters at the scene saw blood stains on the street and ambulances leaving the area.
The bomber appeared to have entered an area where guards were performing security checks when he detonated the explosives.
Afghan President Ashraf Ghani condemned the attack as a "crime against humanity and an unforgivable act."