At least four people were killed and dozens wounded in a bomb attack on Dec. 3 during a regular Sunday Mass at Mindanao State University's gymnasium in Marawi, the country's largest Muslim city.
Mindanao State University issued a statement condemning "the act of violence," as it suspended classes and deployed more security personnel on the campus.
Security officials have said the bombing, which wounded around 50 people, may have been a retaliatory attack for a series of military operations against Islamist militant groups in recent days that killed multiple fighters.
Pro-Islamic State Maute and Abu Sayyaf militants -- including foreign and local fighters -- held Marawi under siege in 2017. The Philippine military wrested back the ruined city after a five-month battle that claimed more than 1,000 lives.
Militant attacks on buses, Catholic churches, and public markets have been a feature of decades-long unrest in the region.
Photos: AFP