Rescue teams were headed to China's southwestern Sichuan province after a 6.1 magnitude earthquake killed 22 people and injured dozens, state media said on Sunday.
Saturday's quake killed 17 people in Sichuan and five others in the neighboring province of Yunnan, the official Xinhua News Agency said.
The agency said about 100 people in Sichuan and 35 in Yunnan were injured by the earthquake that hit 31 miles (50 kilometers) southeast of Panzhihua city in the southwestern corner of Sichuan late Saturday afternoon.
Nearly 1,000 houses were destroyed in Panzhihua, and it was not known how many people were buried in the rubble, the report said. The China Earthquake Administration has sent teams and seismic experts to the quake-hit area while the Yunnan provincial civil affairs bureau and the Yunnan Red Cross Society sent 3,400 tents and 2,000 quilts, Xinhua said.
Relief efforts were hampered by heavy rains and the region's rugged terrain, it said.
Also on Saturday, an earthquake measuring 5.3 on the Richter scale struck the northwestern region of Xinjiang, Xinhua said in a separate report.
No casualties were reported from the quake that hit the sparsely inhabited Tianshan mountains although the tremor was felt in nearby counties and the city of Korla, the agency reported. On May 12, a 7.9 magnitude earthquake in northern Sichuan killed nearly 70,000 people and left 5 million homeless. The region has been hit by scores of aftershocks, keeping people there on edge.