Gangtok: A sudden cloud burst over Lhonak Lake in North Sikkim has resulted in a flash flood in the Teesta River in Lachen valley on Wednesday, which was compounded by the release of water from a dam, leading to 23 army personnel being washed away, camps and vehicles being submerged, officials said.
The floods started around 1.30 am, they said.
Defence officials said establishments along the valley have been affected and efforts are on to confirm details.
