ISLAMABAD — Pakistan hanged four Islamist militants on Sunday in the second set of executions since the government lifted a moratorium after the Taliban massacred 132 children and nine others at a school last week.None of those hanged has anything to do with Tuesday's school rampage in Peshawar, and some Pakistani commentators have said the executions are intended to divert attention from the failure to satisfy public demands to find the killers.Four prisoners were executed at the tightly guarded Faisalabad jail for their role in attacking former Pakistani president Pervez Musharraf, a senior government official said. Two others had been hanged at the same jail on Friday.A source in the local Punjab government identified the four as Rasheed Qureshi, Zubair Ahmad, Ghulam Sarwar and Akhlaque Ahmed, also known as Russi, who he said was Russian.Pakistan is home to a range of militant groups, many of them linked to al Qaeda, based in lawless tribal areas. They include an unknown number of foreign fighters, thought to be mostly Arabs, Uzbeks, Chechens and Uighurs.