Sudden floods triggered by heavy rains have killed more than 200 people across parts of Pakistan, India-administered Kashmir and Nepal, authorities have said, as scores of people remain missing.

Most of the deaths were recorded by disaster authorities in the mountainous Khyber Pakhtunkhwa province in north-west Pakistan. At least 74 homes have been damaged, while a rescue helicopter crashed during operations, killing its five crew.

Pakistan has seen higher-than-normal monsoon rains since June 26 that have killed at least 645 people across the country, with 400 deaths in the northwest. The National Disaster Management Authority issued an alert for further flooding after new rains began Sunday in many parts of the country.