Bomb Explodes in South Philippines, 13 KilledSat May 10, 2003 09:27 AM ET By Rosemarie Francisco MANILA (Reuters) - Muslim rebels linked to al-Qaeda claimed responsibility for a bomb explosion in the southern Philippines on Saturday in which at least 13 people were killed and dozens wounded, officials said. The blast occurred just outside the main market in the town of Koronadal on the southern island of Mindanao. Officials said 13 people, including the suspected bomber, were killed and about 40 injured. The Abu Sayyaf, a Muslim rebel group better known for kidnap-for-ransom in the south of the Roman Catholic...