Pakistani forces killed 39 militants in fresh clashes and airstrikes, officials said Saturday, as the government expanded a military offensive after a school massacre. At least 16 Taliban fighters were killed in separate clashes at two checkpoints in Orakzai tribal district Saturday morning, dpa quoted a military statement as saying. It said three soldiers were wounded. Fighter jets pounded militants' hideouts in North Waziristan tribal district overnight, killing 23 fighters and destroying an underground ammunition dump, the military said.