Authorities in Sikkim on Thursday said that flash flood hit North Sikkim district and submerged the National Highway 10 at Pegong, reported news agency PTI.

Heavy rains lashed North Sikkim on Thursday night which resulted in the overflow of nearby rivers leading to the flash flood that engulfed the highway. Areas such as Lachen and Lachung in North Sikkim have been cut off from the rest of the state due to flash floods, they told PTI.