There is seldom a dull moment on the Guangzhou subway. Another incident has made the news, this time on line 5.

After refusing to have their luggage checked before boarding at Dongpu Station, a man in his 40s and a man in his 60s beat up a security guard on the subway on Monday, causing severe head injuries, Southern Metropolis Daily reports.

They were seized and detained after the train stopped at Sanxi.

According to an eyewitness, a man in his 40s attacked the security guard shortly after boarding at around 6 p.m. when he refused to have his luggage checked. The man then punched the security guard repeatedly in the back of the head.

A man in his 60s later sat on the security guard when he was down, hitting him an estimated 12 times before the train stopped at Sanxi.

Authorites explained that the two men, along with two others who were carrying large amounts of luggage suspected to contain dangerous items, were arrested and the security guard was taken to hospital.

The two who beat the security guard have been detained for 3 days. The other day were fined 200 yuan each for failing to comply with authorities.

The security guard was hospitalized with concussion.