Three students killed in school

A distraught mother mourned her "perfect" son on Sunday, after he was killed when his school collapsed during tremors in Yunnan province.

Wang Yaoyou, 7, was one of three students crushed to death on Friday when the classroom where they were eating lunch was razed by a violent earthquake.

"He was such a good boy, perfect," said Zhang Congmin, the boy's 41-year-old mother, who also has two daughters.