A hit-and-run attack at a sports centre in the southern Chinese city of Zhuhai killed 35 people and severely injured 43, local police said on Tuesday.

The incident happened at 7:48pm (1148 GMT) on Monday, when a small off-road vehicle was driven into a large group of people exercising outside the sports centre.

Zhuhai police said in a statement that the suspect, a 62-year-old man surnamed Fan, was being treated at a hospital after hurting himself with a knife in his car.

A Reuters reporter at the scene on Tuesday evening said people had begun leaving wreaths, counting 18 laid in front of a sign for the Zhuhai People’s Fitness Square. Others lit candles and incense. The police presence was low.

A video, verified by Reuters, of the scene on Monday following the attack had shown at least 20 people lying on the ground. Cries of “terrorist” could be heard as ambulances arrived to take the injured to hospital.

Hundreds of rescue personnel from Zhuhai city and Guangdong province were deployed to provide emergency treatment, and more than 300 healthcare workers from five hospitals worked around the clock to save lives, state media Beijing Daily reported.

Fan was apprehended by police at the scene after attempting to flee, police said, adding that he had self-harmed using a knife, causing severe neck injuries.

Police said their preliminary investigation suggested the incident was triggered by Fan’s discontent following a divorce.

President Xi Jinping, cited by Chinese state television CCTV, ordered all-out efforts to treat the injured and demanded severe punishment for the perpetrator. The central government has dispatched a team to provide guidance on handling of the case, CCTV said.

The attack sparked thousands of angry comments on Chinese social media, many of which were quickly censored after the police reported the high death toll.

“Zhuhai is one of the most relaxed, peaceful, and liveable cities in the country, and this tragic incident has left a painful memory that will be hard to erase for many years to come,” one user of the Weibo platform said.

Violent crime is rare in China due to tight security and strict gun laws. However, a rise in reports of knife attacks in large cities has drawn public attention to safety in public spaces.

In October, a knife attack in Beijing left five people wounded outside one of the city’s top primary schools. A month earlier, a Japanese student was fatally stabbed outside his school in Shenzhen.

Zhuhai is hosting China’s biggest annual air show this week where a new stealth jet fighter will be on display for the first time.