Suspected bomb blast kills at least four worshippers during Mass in Philippines

A powerful explosion tore through a Catholic Mass at Mindanao State University in Marawi city in the southern Philippines, killing several people and injuring dozens of others (Froilan Gallardo/AP)

A powerful explosion, believed to have been caused by a bomb, tore through a Catholic Mass, killing at least four people and injuring dozens of others in a predominantly Muslim city in the southern Philippines, officials said.

The Sunday morning Mass was under way in a gymnasium at the state-run Mindanao State University in Marawi city when the blast happened, causing panic among dozens of students and teachers and leaving the victims bloodied and sprawled on the ground, said Taha Mandangan, the security chief of the state-run campus.