A bomb went off outside an airport in Zamboanga City in the southern Philippines, killing two people and wounding 24, local officials said. Police said the blast was caused by an improvised explosive device. "There was one man who died on the spot and he could be the one who detonated the explosive device," Celso Lobregat, mayor of the city on Mindanao Island, told reporters after the incident. He later said another man had died while being treated at a hospital and 24 were wounded. They included Sakur Tan, governor of the southern island of Jolo, a hotbed of militancy in the mainly Roman Catholic state.