A landslide at a jade mine in northern Myanmar killed at least 126 people, with more feared dead, authorities said on Thursday, after a heap of mining waste collapsed into a lake, triggering a wave of mud and water that buried many workers.

The miners were collecting stones in the jade-rich Hpakant area of Kachin state when the “muddy wave” crashed onto them, after heavy rain, the fire service department said in a Facebook post. Rescue workers recovered 126 bodies, the department said, but more were missing.

“Other bodies are in the mud,” Tar Lin Maung, a local official with the information ministry, told Reuters by phone. “The numbers are going to rise.” Deadly landslides and other accidents are common in the poorly regulated mines of Hpakant.