At least four people were killed and eight others injured as a blast hit south gate of Kabul University in the Afghan capital on Friday, an Interior Ministry official, Bahar Mehr said.

The blast took place at 7:10 a.m. local time when a number of students were gathered to enter the Master degree examination, the official said, adding a girl is among those injured in the blast.

Investigation is underway and details will be shared with media after completion, the official added.