Pakistan's air strikes at the militants' hideouts along the Afghan border Wednesday, killed up to 31 insurgents, government and security officials said. There were air strikes in the bordering regions of Kurram and Orakzai, said government officials Wajid Khan and Ameer Gul. Meanwhile, gunmen attacked a Pakistani paramilitary checkpoint in the Marwarh area of southwestern Baluchistan province late Tuesday, killing six troops and setting off a gun battle, government official Fateh Bangalzai was quoted as saying by the Associated Press.