"As of 9:10 am, more than 10 people died, and over 30 of the injured were sent to hospital in Aranyaprathet district of Thailand’s Sa Kaeo province," Phoeng told The Phnom Penh Post.
He added that over 400 people, most of them Thais, are stuck at the casino-hotel.
The fire broke out on Wednesday night and has yet to be extinguished. Phoeng added that the authorities have yet to determine the cause of the fire.
Cambodian National Committee for Disaster Management Vice-President Kun Kim told reporters that fire crews and helicopters had been dispatched to the scene to save those stranded inside the casino.