Pakistani officials say they are expanding rescue and relief operations after flash floods killed more than 220 people in a single northwest district and destroyed homes, roads, and businesses.

In Pakistan, a helicopter carrying relief supplies to the flood-hit northwestern Bajaur region crashed due to bad weather, killing all five people on board, including two pilots, a government statement said.

At least 340 people have been killed in flash floods triggered by heavy rains in Pakistan. Reports suggest that the mountainous region of Khyber Pakhtunkhwa has been the most affected.