A woman has been arrested on suspicion of possessing an offensive weapon after brandishing a knife while looking for her husband at City University of Hong Kong in Kowloon Tong.

Police said a security guard reported that the wife of a colleague was seen holding a knife on a campus bridge at around 9.53am on Tuesday.

A spokesman for the force said the 45-year-old woman had first arrived at the bridge claiming that she could not find her husband.

She left the campus and bought a 21cm-long (8.2 inches) ceramic knife from a supermarket before returning to the university to search for her husband.

A 52-year-old security guard told the woman that her husband was not on campus. The woman then pointed the knife at the security guard, causing a 4cm “red mark” on his chest, according to police.

The guard was sent to the Caritas Medical Centre in Sham Shui Po for treatment.