Sudden floods triggered by heavy rains have killed more than 400 people across parts of Pakistan, India-administered Kashmir and Nepal, authorities have said, with scores of people still missing.

ISLAMABAD (Reuters) -Nearly 200 people were killed in torrential rains in northwest Pakistan over the past 24 hours, with bad weather also bringing down a rescue helicopter, local officials said on Friday.

Rescuers struggled to retrieve bodies from muddy debris on Saturday after flash floods triggered by heavy monsoon rains across northern Pakistan killed at least 344 people in the past 48 hours, authorities said.