At least 20 people have been killed in twin blasts at a Roman Catholic cathedral on the southern Philippine island of Jolo.

Yesterday's incident claimed the lives of at least 15 civilians and five soldiers, police said, adding that 111 others were injured.

According to security officials, the first bomb went off in or near the cathedral of Jolo, the capital of Sulu province, followed by a second blast outside the compound as government forces were responding to the attack.