BEIJING, May 6 (Xinhua) -- Beijing police have refuted a rumor that a school attack occurred Thursday morning at a primary school in the city.

An Internet post said an attack was carried out at Xiwang Primary School at around 9 a.m. in Sibozi of Beijing's Changping District and the police evacuated all the students on campus.

"There is no such school in Sibozi. And we never received a report of a school attack," said a spokesman with the Beijing Municipal Public Security Bureau Thursday afternoon.

The police have launched an investigation into the source of the rumor, said the spokesman.

The rumor came after a series of recent school attacks in China's Fujian, Guangdong, Jiangsu and Shandong provinces.