Two Pakistani policemen were killed in a bomb blast on Saturday in resurgent violence in the northwestern Swat Valley, police said. The policemen were heading towards Kabal, a stronghold of the militants, when their vehicle hit the bomb. Three policemen were wounded. "We were returning from holiday and going to Kabal when bomb exploded under our vehicle," inspector Mohammad Wisaal, one of the wounded men, told Reuters in a hospital in Swat's main town Mingora.