Anguished Pakistanis are searching remote areas for bodies swept away by weekend flash floods as the death toll has reached 277.

Over 350 people have died in a 72 hour period in Pakistan due to monsoon flooding, Pakistan's National Disaster Management Authority reported, bringing the total number of people killed to over 650 since June 26.

Across the wider province of Khyber Pakhtunkhwa, at least 314 people have been killed and 156 injured due to rains and flash floods that began between Thursday and Friday night. Buner district, where Bishnoi is located, is the worst-affected, with 217 fatalities, according to the Provincial Disaster Management Authority (PDMA).