A home-made bomb ripped through a bus terminal in Mindanao's Cotabato City May 18, killing three and injuring 15 others. About half of the casualties were children. Authorities said the motive was probably extortion, as the bus company had been receiving letters from armed groups demanding money. But Mindanao has been hit by seven bombings this year, many of them blamed on Muslim extremists linked to the Jemaah Islamiah or al-Qaeda terror networks. The bombing came barely a week after Australia and the United States warned their citizens of possible terror attacks in Central Mindanao. On May 8, a device went off in a crowded market in Tacurong, killing eight. (Manila Times, May 19; GMA, May 18)

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