At least four persons were murdered and dozens were injured in a suspected double suicide explosion outside a boys' high school in Kabul, Afghanistan's capital.
The explosions occurred at the Abdul Rahim Shahid school in the city's Shia-dominated west. The number of those killed or injured is expected to climb.
A grenade strike was also launched against a neighbouring tutoring centre.
There was no instant admission of guilt. In the past, militants from the Islamic State have assaulted the region.
According to sources at Kabul's Muhammad Ali Jinnah Hospital, four people have died and 19 have been wounded as a result of the school incident.
One witness told the AFP news agency that the bombs occurred as students were leaving morning lessons.