Duong Kimlong (centre) enters the Phnom Penh Municipal Court last month. Photograph: Hong Menea/Phnom Penh Post

The Phnom Penh Municipal Court has completed its investigation into the sons of property tycoon Oknha Duong Ngiep, with hearings due to be set for this month, a court official said yesterday.

According to court documents obtained by the Post, Duong Otdom Chhorvi, also known as Duong Chhay, 20, his younger brother Duong Kimlong, 17, and Kimlong’s bodyguard Ly Rayuth, 20, were charged with causing injury, possessing illegal weapons and destroying private property.

The trio were involved in a Khmer New Year brawl on April 14 at a restaurant in Phnom Penh’s Chamkarmon district, where Kimlong allegedly pistol-whipped a 28-year-old and threatened to shoot others. Investigating judge Te Sam Ang said he closed the investigation into the case of Duong Chhay and Duong Kimlong on May 6, with the case now submitted for pre-trial hearings.

Nach Try, a defence lawyer for the brothers, said he had been informed about the closure of the case.

“I have been informed that the investigation on my client’s case was completely done and closed. But until now, the court has not set the date of their trial,” he said.

Try added that he would not comment on the case before the court hearings.

However, a court officer who asked not to be named told the Post yesterday that that the hearings will take place before the end of the month.

The victim, Mom Dina, and his defence lawyer could not be contacted for comment yesterday.