At least one person was killed and dozens were missing, feared dead, after a landslide dislodged waste at a jade mine in northern Myanmar and swept them into a lake early on Wednesday, rescue workers and a civil society group said.

The landslide occurred in the remote Hpakant area of Kachin state at around 4am (2130 GMT on Tuesday), Dashi Naw Lawn, an official at the Kachin Network Development Foundation said. About 80 people were swept into the lake, the official said.

Rescue workers said one body had been spotted floating in the water and they feared all the others had perished in the latest tragedy to hit Myanmar’s jade industry.