Thai security personnel are instructed to be careful of ill-intended people who are reportedly to incite violence during a mass rally, Prime Minister Abhisit Vejjajiva said Saturday.

Members of "red-shirts", supporters of the United Front for Democracy against Dictatorship (UDD), travel to Bangkok, capital of Thailand, March 13, 2010. The demonstration organized by the UDD started on Friday when the red-shirted supporters of fugitive former Prime Minister Thaksin Shinawatra are traveling to Bangkok. [Lui Siu Wai/Xinhua]

No violence has been reported as of 3 p.m. at the rally sites across the country.

The ill-intended people, or the "third party" termed by the local media, are reportedly to dress like soldiers or policemen, and get blended in the anti-government protestors to incite violence during the mass rally, Thai News Agency reported.

On March 5, Abhisit said it is believed that the majority of the anti-government group will constitutionally protest, but only some people among the majority of the protestors want violence to achieve their goal, which is not democratic.

Hence, the general public should report any irregularity to security officers as the mass rally is going on in capital Bangkok, the prime minister said.

His statement was made as more anti-government protestors are gathering at Bangkok.

Thailand's weekly cabinet on Tuesday decided to impose the Internal Security Act (ISA) in eight provinces during March 11-23 to ensure law and order during the rally by the anti-government United front for Democracy against Dictatorship (UDD) group.

Of the total eight provinces, the ISA imposition has been enforced in the whole area of capital Bangkok and Nonthaburi, which is next to Bangkok, while it is imposed in some 21 districts of the six other provinces nearby Bangkok, including Pathum Thani, Samut Prakan, Samut Sakhon, Chachoengsao, Nakhon Pathom, and Ayutthaya.

Under the ISA law's enforcement, there are 50,000 security men, who will maintain security during the mass rally.

Members of "red-shirts", supporters of the United Front for Democracy against Dictatorship (UDD), travel to Bangkok, capital of Thailand, March 13, 2010. The demonstration organized by the UDD started on Friday when the red-shirted supporters of fugitive former Prime Minister Thaksin Shinawatra are traveling to Bangkok. [Lui Siu Wai/Xinhua]