The bombing came after twin blasts tore through two department stores last Thursday in Zamboanga, a predominantly Christian port city about 530 miles south of Manila. Those explosions killed seven people and injured more than 150.
The Radio Mindanao Network identified the one death as a Filipino marine corporal assigned to guard the church's gate. He died en route to hospital.
The bomb attack also followed two other bombings in Manila on Friday. A grenade went off in Makati, the Philippines’ main financial district, but no one was hurt in the blast. Later, a bomb ripped open a bus in the capital, killing two people and injuring 20. Security officials suspect the Zamboanga blasts may have been staged by the Muslim extremist group Abu Sayyaf, linked to al-Qaida, or Muslim separatists intent on diverting ongoing military offensives.