Pakistani security forces on Sunday killed in a shootout five militants in the country’s restive southwest area. Security officials said the operation targeted militants in the Mastung area of Baluchistan province who were alleged to have been behind a bomb attack Friday that left three people dead and six injured. The shootout left four members of the security forces injured, Pakistan’s counterterrorism police said in a statement. The province has been the scene of a low level insurgency by Baluch separatist groups for over two decades. Islamic militants also operate in the region that border…