Century Entertainment says that the opening of a new casino in Dara Sakor in which it aims to place its mass-market tables, will be delayed until further notice.
Sihanoukville has imposed a mandatory 14-day quarantine on all passengers arriving by air from the capital and from Siem Reap to curb the spread of Covid.
Donaco International said its revenue in the March quarter plunged by half due to a new outbreak of Covid in Thailand and Cambodia resulting in border closures and the shutdown of its Star Vegas property.
Governments in Southeast Asia are reportedly cracking down on illegal migrant labour and border crossings to stem a growing outbreak of Covid-19.
Cambodia has lifted a ban on interprovincial travel and said tourism resorts can reopen for business. However, the lockdown remains in place in Phnom Penh and neighbouring Takmao.
Malaysia's WA Hospitality is set to open a casino resort in Sihanoukville in the first quarter of next year.