China's top leaders have urged "all-out efforts" to treat those injured in a car attack in southern China, one of the deadliest incidents in the country's recent history, as online posts asking what the attack says about Chinese society were censored.

ZHUHAI, China — A man who authorities said was upset over his divorce settlement rammed his car into a crowd of people exercising at a sports complex in southern China, killing 35 and severely injuring dozens of others, police said Tuesday.

But it was the second such incident to occur during the Zhuhai airshow: in 2008, at least four people were killed and 20 injured when a man drove a truck into a crowded schoolyard during the airshow. Police said that attacker had been seeking revenge over a traffic dispute.