Philippine troops have killed six militants in an assault on a rebel camp in the south. The military said marines raided the camp of the Abu Sayyaf group on Jolo island. Officials are trying to verify reports that a senior Abu Sayyaf commander was among those killed. Abu Sayyaf has been blamed for bombings, beheadings and kidnappings of Filipinos and foreigners. It has been accused of links with al-Qaeda.One marine was killed and three were wounded during the assault.