TAIPEI, Taiwan (AP) — Numerous children were injured by a vehicle at the gate of an elementary school in central China’s Hunan province on Tuesday morning, reports said.

Students were arriving for classes around 8 a.m. at Yong'an Elementary School in the city of Changde when it happened.

No details were immediately available, and it wasn’t clear whether the vehicle had lost control or whether it was a deliberate attack.

Chinese schools have been subject to numerous attacks by people armed with knives or using vehicles as weapons.

A stabbing attack at a vocational school in the eastern Chinese city of Wuxi on Saturday left eight people dead and 17 others injured.

That came shortly after a man drove his car into people at a sports facility in the southern city of Zhuhai, leaving 35 people dead and 43 others injured.

In September, three people were killed in a knife attack in a Shanghai supermarket, and 15 others were injured. Police said at the time that the suspect had personal financial disputes and came to Shanghai to “vent his anger.”

The same month, a Japanese schoolboy died after being stabbed on his way to school in the southern city of Shenzhen.