BEIJING (AP) _ A strong earthquake that killed 50 people in northern China earlier this month left many cracks in China's Great Wall, state media reported Thursday.

The magnitude 6.2 quake on Jan. 10 left cracks in the wall in Shangyi, Zhangbei and Wanquan counties of Hebei province, the official Xinhua News Agency quoted He Yong, the director of the Beijing Administration of Cultural Relics, as saying.

The wall in that area was mostly built during the Ming Dynasty, from 1368-1644. About 20 buildings from that period also have cracks from the quake, he said.

The report did not say how serious the cracks were.

China's Great Wall, began in the 3rd century B.C., runs 1,500 miles along the edge of the Mongolian plateau. Its width ranges from 12 to 40 feet, and its height from 20 to 50 feet.