Catholic priests have filed a petition with the Supreme Court of Sri Lanka targeting the government for failing to act on warnings that could potentially have prevented the Easter Sunday bombings by Islamic extremists.

The priests have accused 13 public officials, including Prime Minister Ranil Wickremesinghe, of dereliction of duty and violating fundamental human rights, including Catholics’ right to freely practice their religion.

A local group of radicals affiliated with the so-called Islamic State (IS) bombed three churches and three luxury hotels on April 21, killing 253 people and injuring more than 500.