An off-duty police personnel has opened fire at a downtown karaoke lounge in Macao, injuring one civilian, the local police said Saturday.

Xu Yiping, spokesman for Macao's Judiciary Police, told Xinhua that the incident took place on early Friday when the police officer, surnamed Lo, was engaged in a quarrel with another patron at the Dynasty Plaza karaoke club.

Lo, a tactical unit officer, fired a shot at the ceiling that was diverted down and grazed the victim's neck, said Xu.

Xu added that the victim has been hospitalized and he is in a stable condition.

An investigation into the incident is under way, said the spokesman.

Source: Xinhua