The government will invoke the Internal Security Act for nine days, starting today, in three Bangkok districts to handle the anti-government mass rally scheduled for this Saturday.
Deputy Prime Minister Chalerm Yoobamrung said the three districts are Phra Nakhon, Pomprab Satrupai and Dusit.
The National Security Council expects some 40,000 demonstrators to join the rally organised by Pitak Siam leader Gen Boonlert Kaewprasit at the Royal Plaza on Saturday, though police believe 50,000 people will show up.
The ISA enforcement empowers the government to call military reinforcements if police fail to control the crowd.
The decision was made in a meeting of ruling Pheu Thai Cabinet meeting and chaired by Prime Minister Yingluck Shinawatra.
Police Commissioner General Pol Gen Adul Saengsingkaew had prepared 112 companies comprising 16,800 policemen to maintain security around the rally site. He said 23,000 civilian volunteers will also be on standby at 192 Bangkok police stations, ready to be deployed if police need help to control the situation.