Four killed in bomb attack on Catholic mass in Philippines

At least four people were killed and dozens wounded in a bomb attack on a Catholic mass in the southern Philippines on Sunday, with President Ferdinand Marcos blaming "foreign terrorists". 

The blast happened during a morning service at Mindanao State University's gymnasium in Marawi. Police said four people were killed and around 50 wounded in the blast that was caused by an improvised explosive device. Other security officials said the bombing may have been a retaliatory attack for a series of military operations against Islamist militant groups in recent days.