Gunmen attacked a police post in Pakistan’s insurgency hit southwestern Baluchistan province, killing two constables, and floodwaters washed away a passenger van killing four women and a child, officials said Sunday. Police officer Aziz Jamali said the gunmen fled on motorcycles after shooting the police officers at the Mundrani security post near the town of Dera Murad Jamali. No one immediately claimed responsibility for the attack but Baluch separatist groups who want independence from Pakistan have been active in the mineral- and gas-rich area. Also on Sunday, a passenger van carrying some…