The earthquake hit Xaitongmoin County at 3.32 a.m. It struck at a depth of 8 km, the China Earthquake Networks Centre was cited as saying by Xinhua news agency.
Investigators found cracks in some rural houses and damage on some livestock sheds in the county, said the county’s Publicity Department.
The local governments prepared tents, quilts, coats and medical supplies for the affected people. Traffic and telecommunications in the region remained undisturbed.