New Delhi, Aug. 16 -- A helicopter crashed during a rescue mission in monsoon-hit northern Pakistan on Friday, killing five crew on board, the chief minister of Khyber Pakhtunkhwa province said in a statement.

"An MI-17 helicopter of the provincial government, carrying relief goods for rain-affected areas of Bajaur, crashed in the Pandiyali area of Mohmand district due to bad weather," Ali Amin Gandapur said in a statement, as reported by AFP. "Five crew members, including two pilots, were killed."

The death toll from heavy monsoon rains that have triggered flash floods across northern Pakistan has risen to at least 321 people in the last 48 hours, disaster agencies said Saturday, AFP reported.

The majority of deaths, 307, were reporte...