Pakistani troops killed 20 Taliban militants Friday in operations in Hangu, a day after a double suicide bombing killed 64 people at a major arms factory, officials said. Pakistan's shaky coalition government is struggling with an upsurge in Taliban bloodshed, with Thursday's attack near Islamabad being the second big attack since Pervez Musharraf resigned as president on Monday. Police said fifteen rebels, including several would-be suicide bombers, were killed in return fire when they attacked an army checkpost near the restive town of Hangu on Friday. "The army stopped a vehicle carrying these militants at the checkpost, but they hurled grenades and opened fire at the soldiers," local police officer Sher Bahadur told Agencies. "In the ensuing gunbattle, 15 militants were killed and one was arrested alive." Chief military spokesman Major General Athar Abbas confirmed the clash but said he did not have details of casualties.