Chinese state media say six people were wounded Tuesday in a knife attack at a train station in a southern city, the latest in a series of such attacks.

The People's Daily says four knife-wielding men dressed in all white attacked passengers who had just gotten off a train in Guangzhou Railway Station.

The report said police fired at the men, killing one and capturing another. The other two escaped, though some state media reported that one was later caught.

Officials have not commented on a motive, though the attack bore similarities to others the government has blamed on terrorists from the restive region of Xinjiang.

Foreign Ministry spokeswoman Hua Chunying would not speculate, but promised "strong and effective measures to earnestly protect social stability."

"At present, the Chinese police are investigating the relevant case. I believe they will publish the investigation results in a timely manner. What I want to stress is that no matter what reason it is for or no matter who it is, it's unacceptable to harm innocent people with violence. It's also a criminal activity that should be punished by law."

The attack comes less than a week after one person was killed and 79 others wounded in a bomb and knife attack at a train station in the western city of Urumqi.

In March, machete-wielding attackers killed 29 people and wounded 143 at a railway station in the southwestern city of Kunming.

The government blamed both of those attacks on extremists from Xinjiang, where mainly Muslim Uighurs complain of government persecution.

In recent years, China has also seen an increase in deadly mass stabbings carried out by individuals who are mentally unstable or have a grudge against society.