led guerrillas on Tuesday ambushed an army convoy escorting election officials in a remote town on the southern island in the Philippines, killing six people and wounding a dozen, an army spokesman said. A team of soldiers with local election officials were on their way to return vote-counting machines to Margusan town in the mining region on Mindanao when New People's Army (NPA) rebels opened fire on them, Lieutenant-Colonel Ernesto Torres said. “We lost four soldiers and two civilians, including an election officer, were killed in the attack,” Torres said, adding a dozen others, including nine soldiers, were wounded. Torres said NPA rebels were behind the attack, saying it was “a grave attempt to jeopardise the country's democracy”. On Monday, when voting took place, bombs, grenades and shootings killed nine people and wounded 12, which security officials described as one of the country's most peaceful elections.