Explosions targeting educational centers injured at least seven children in Afghanistan’s capital city on Tuesday, with reports of at least three bombs detonating in a mostly Shiite neighborhood, police stated.

The blasts, which occurred in rapid succession, hurt several children and more casualties were feared, according to Kabul police spokesman Khalid Zardan and the city’s Emergency Hospital

The explosions occurred near Abdul Rahim Shaheed High School and inside an education center, where exams are taken in the Dasht-e-Barchi neighborhood of Kabul.

No one has immediately claimed responsibility. The area has been targeted in the past by Afghanistan’s deadly Islamic State affiliate, which reviles Shiite Muslims as heretics.