Bangkok - Thailand's government will deploy 10 000 police in the capital for Sunday's election, which protesters have promised to disrupt as part of their drawn-out attempt to topple Prime Minister Yingluck Shinawatra.
The government decided on Tuesday to press ahead with the 2 February election, which the main opposition party plans to boycott.
"I ask Bangkok residents to come out and vote", labour minister Chalerm Yoobamrung told reporters on Wednesday.
"The police will take care of security. Those who are thinking of going and shutting polling stations in the morning should think twice because the police will not allow them to."
Protesters prevented early voting at many polling stations in Bangkok last Sunday.
They took to the streets in November in the latest eruption of a political conflict that has gripped Thailand for eight years. It broadly pits Bangkok's middle class and royalist establishment against the mainly poor, rural supporters of Yingluck and her brother, ousted former premier Thaksin Shinawatra, who lives in self-imposed exile.
The protesters accuse Yingluck of being a puppet of Thaksin, a man they say is a corrupt crony capitalist who used taxpayers' money to buy elections with costly populist giveaways.
Chalerm, who is in charge of a state of emergency imposed last week, told reporters about 10 000 police would be dispatched on Sunday to take care of security at the capital's polling stations.
Even though Yingluck's ruling party is certain to win, not enough candidates have been able to register to provide a quorum in the new parliament after the election.
By-elections will have to be held later to fill the vacant seats, which means the prospect of a caretaker, and fairly powerless, government under Yingluck for several more months.
The protests are taking their toll on the economy and even major foreign investors are beginning to question the merits of ploughing any more money into their Thai operations.
Protesters took to the streets of Bangkok again on Wednesday but in a relatively small rally of about 500 people.
They were without their firebrand leader, Suthep Thaugsuban, who was apparently deterred by the previous day's violence in which a protester was shot and wounded.
In a sign of how the legal establishment has largely lined up against Yingluck's government, a criminal court on Tuesday rejected a government application for an arrest warrant against Suthep, saying there was not enough evidence to grant it.
Suthep is already wanted for insurrection and on charges of murder related to violence in 2010 when, as deputy prime minister, he sent in troops to crush protests by "red shirt" supporters of Thaksin. The death toll then was more than 90.
The Election Commission, also widely seen as favouring the establishment-aligned opposition, had been arguing for a delay in the vote of up to four months, saying the country was too unstable to hold an election.
There are widespread fears that violence could escalate.