GUANGZHOU, May 6 -- Six people were injured in a knife attack at a railway station in the southern Chinese metropolis of Guangzhou on Tuesday morning, local authorities said.

The attack happened at about 11:30 a.m. in the square of Guangzhou Railway Station, according to police.

Four of the injured, three women and a man, are receiving treatment at the General Hospital of Guangzhou Military Command of the People's Liberation Army. Their injuries are not life-threatening.

A male suspect with a knife was shot and caught by police.

The attack did not affect railway operations, according to Guangzhou Railway (Group) Corporation.

The incident is the latest attack at a crowded train station in the country within the past 70 days.

Three people were confirmed dead and 79 others were injured in a terrorist attack at a railway station in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on April 30.

On March 1, knife-wielding assailants killed 29 civilians and injured another 143 at a railway station in the southwestern Chinese city of Kunming.

The cause of the Guangzhou incident is being investigated.