Casino company Sky City Entertainment says it is monitoring the situation in China after 18 employees at its competitor, Crown Resorts, were detained by authorities there last week.

"Sky City does not have any staff in China, but we do use independent contractors there," a Sky City spokesperson said in a written response to a query from the Herald.

"We are very confident these contractors comply with all relevant laws and regulations," the spokesperson said.

"We have been in contact with these contractors and none have been detained or are involved in this situation," Sky City said.


"Like other Australasian casino operators, Sky City is continuing to monitor developments closely,'' the spokesperson said.

Crown's share price in Australia dropped by 10 per cent on the back of the new on Monday and Sky City's share price also dropped back.

Sky shares last traded at $4.38, down 7 cents, while the broader tone of the market was soft.

In Australia billionaire James Packer, who owns just under half of Crown, said he was"deeply concerned" for the welfare of the 18 employees, AAP reported.