Three killed in Manilla bomb

At least three people were killed today when a bomb ripped through a bus in suburban Manila, the capital of the Philippines, police said.

The incident in Quezon happened despite tightened security following two deadly bombings yesterday in a southern city and a grenade blast last night in Manila’s financial district.

The explosion in the back of the bus ripped off its roof and part of its carriage. There was no immediate claim of responsibility.

Officials have said the al-Qaida-linked Abu Sayyaf group was the most likely suspect for yesterday's bombings in Zamboanga that killed seven people and injured more than 150.

The group recently threatened attacks in retaliation for an ongoing military offensive against it, and has been blamed for an October 2 bombing in Zamboanga that killed four people, including an American Green Beret.