SINGAPORE - A construction site project manager who got into a quarrel with a coffee shop patron smashed a beer bottle over the latter's head and then called the police to complain about the victim, a court heard.

Lee Poh Heng, 48, was on Tuesday (Oct 11) jailed for six weeks after he pleaded guilty to one charge of causing hurt.

The court heard that Lee had been drinking beer with three friends at a coffee shop at Block 261, Serangoon Central Drive, between 1am and 2am on Feb 26 in 2015.

Mr Surendran Rajoo, 37, a rigger working at Jurong Port, was drinking at the coffee shop at another table with Mr Lee Yak Soon, 55, a beer attendant.

At about 1.30am, Lee and Mr Surendran spoke to each other, although they were not acquainted, the court heard.

An argument broke out and Mr Surendran asked Lee to shut up in Hokkien, before returning to his seat.

Shortly after, Lee took an empty beer bottle and smashed it on Mr Surendran's head. The bottle broke.

Lee then used the piece of the bottle that was still in his hand to slash Mr Surendran's arm.

The assailant fled and called the police at about 2am, alleging that Mr Surendran claimed to belong to a gang.

"I am afraid and quickly returned home, he is still at the coffee shop," Lee told the police.

Mr Surendran went to the hospital at about 5am. He was found to have glass pieces embedded in his scalp and there were many cuts on his scalp.

There were also multiple deep cuts over his left forearm, a cut on his right shoulder and a bruise on his neck.

The cuts to Mr Surendran's scalp were glued together, and he was warded for one day and given 30 days of medical leave.

The maximum punishment for causing hurt is two years' jail and a $5,000 fine.