Central Pattana (CPN) has issued a statement declaring its properties off-limits to any political activities.
The statement comes ahead of a planned rally outside CentralWorld tomorrow by anti-government white-mask protesters.
In its statement, CPN, which operates CentralWorld and the Central shopping mall chain, said while it has no policy directly opposing political gatherings, it does not support any group using its premises to assemble or stage any form of political activity.
CPN said its properties are designed to serve as community centres where the public can spend their time in a safe environment, and where entrepreneurs can conduct trade to spur economic growth.
The company said it regrets having to make the announcement, but it could not allow anyone to use its properties to conduct political activities.
There was no immediate response from the white-mask rally organisers.
The area around CentralWorld, adjacent to Ratchaprasong intersection, has been a rallying point for numerous political gatherings in recent years.
According to the "V for Thailand" website, white-mask protesters will gather tomorrow at designated venues in various provinces, including Udon Thani, Mae Hong Son, Chon Buri, Rayong, Suphan Buri, Nakhon Si Thammarat and Narathiwat. Thai communities in San Francisco and Sydney are also planning to hold rallies.
Deputy Prime Minister Chalerm Yubamrung yesterday denied he was trying to scare the anti-government movement when he warned of possible violence against the group.
He said the warning was not intended as a threat. It was a word of caution for the demonstrators' own safety, he said.
"I didn't prohibit them from holding a protest. I am simply asking them to keep within the boundary of their gathering venue so police can step up safety measures for them," he said.
Mr Chalerm said he has been informed of a possible violent plot against the white-mask movement, which has been gaining support in other parts of the country.
Earlier this week, the deputy premier said the government was keeping an eye on the group after the number of white-mask supporters grew sharply, from an estimated 200 to 3,000 in one month. He also accused businesses of giving financial support to the movement.
Mr Chalerm said yesterday the movement would not grow if it received no support from the Democrat Party.
Pheu Thai Party spokesman Prompong Nopparit yesterday accused the white-mask movement of having a hidden agenda. He said he believed the anti-government campaign was being operated by a group which had lost power, and other interests.