At least 26 people were killed and more than 200 remain missing after a chunk of Himalayan glacier broke off in India and sent water and debris flooding the area, according to multiple reports.

Search teams of more than 2,000 people have been searching along the banks of the Alakananda and Dhauliganga rivers in the state of Uttarakhand following the incident on Sunday, the Associated Press reported.

Most of those reported missing were working on two different projects - the small Rishiganga hydroelectric project, which was destroyed, and a bigger one being built by a state firm further down the Dhauliganga river, which was damaged, according to Reuters.