An earthquake toppled more than 1,000 houses and apartment buildings in China's southwest region near the border with Myanmar on Thursday, killing at least 24 people and injuring more than 200, officials and state media said.

Rescue crews are working to find survivors in the debris.

The website of the Chinese government earthquake monitoring station said the magnitude-5.8 quake was centered in Yingjiang and struck just before 1 p.m. at a depth of six miles. The U.S. Geological Survey measured the quake at a magnitude of 5.4 and at a deeper 21 miles.

San Francisco 1906 Photos Found

Meanwhile, six images from the 1906 San Francisco earthquake have been discovered by a volunteer at the Smithsonian Institution.

The photographs are believed to be the first color photos from the earthquake that leveled the Bay City.

All of the pictures were shot at street level and some of the buildings in the images still exist.

The magnitude of the San Fransciso quake was estimated to be as high as 8.25. It was felt as far away as Oregon.