The warning was issued on Thursday in response to postings offering different interpretations of the attack by knife-wielding assailants in southwestern city of Kunming. At least 29 people were killed and the police shot dead four of the attackers.

China says militants from the far western region of Xinjiang, home to a large Muslim Uighur minority, carried out the attack.

Police said they were responding to complaints by netizens over bloggers' criticisms of media portrayal of events.

"One or two public intellectuals have shown scant regard for the facts, confused black and white. Their comments have hurt the people's feelings," the statement said.

The users whose comments were singled out were well-known commentators with thousands or even millions of followers. Screen shots of the offending posts were attached.

Li Chengpeng, a writer and former journalist with over seven million Weibo followers, had posted a quote attributed to a Kunming journalist frustrated at the lack of information about the attacks.

"Never telling you what exactly happened, just letting you blindly hate and feel inexplicably afraid, that is living a confused life and dying understanding nothing," read the post that was subsequently deleted.

He later wrote, "Persecuting people for their writing isn't done like this! I will be waiting at home for them to come and get me".

Cheng Meixin, a former magazine editor with 10,000 followers, questioned the official version of events, saying: "There is no such thing as natural born killers. We have to admit that society isn't perfect and has its failings."

The Communist Party last year stepped up an aggressive campaign to control online interaction, threatening legal action against people who issued "rumours" on microblogs.

Rights groups and dissidents criticized the crackdown as another tool for the party to limit criticism and to further control freedom of expression.