The fire broke out at about midnight on Wednesday at the Grand Diamond City Casino in the town of Poipet, according to a statement by the police in Cambodia’s Banteay Meanchey province.

The statement from the Sa Kaeo province, where Thai casualties have been treated, made no mention of the nationalities.

Police said the fire was under control and hundreds of personnel from the military, police, and rescue teams had been deployed.

It was not immediately clear what started the fire.

Poipet’s casinos are popular with short-term visitors from Thailand, where gambling is illegal and unlicensed casinos operate underground.

Parinya Phothisat, the governor of the Sa Kaeo province on the Thai side of the border, told Reuters by phone that 32 Thais were being treated in hospitals there and one had died.

He could not confirm whether there were more casualties in Cambodia.

Chhay Kim Khoeun, Cambodian national police spokesman, declined to comment on casualties and said that authorities were still working to put out the fire. Provincial and hospital officials could not immediately be reached.

Fresh News showed images of the facade of a casino on Thursday morning blackened by smoke, with fires still burning on the ground floor and charred debris on the pavement outside.

One image showed the fire raging during the night, with flames engulfing multiple parts of the building and smoke billowing out.

Casinos are a key part of Cambodia’s important tourism industry and a draw for visitors from Asian countries where gambling is banned.

Cambodia has casino complexes in Phnom Penh and along its borders with Vietnam and Thailand.