BEIJING (AP) _ An earthquake with a preliminary magnitude of 5.2 rocked a county in southwest China on Thursday, killing at least one person and injuring five others.

The quake struck at 12:40 a.m. local time in Chengjiang county in Yunnan, a province that borders Myanmar and Laos, said a local official, who gave only her surname, Li. Chengjiang is about 30 miles south of Yunnan's provincial capital, Kunming.

One pregnant woman was killed, five people were injured and more than 90 buildings were destroyed, Ms. Li said. County officials worked during the night to provide first aid and temporary housing, she said.