"Today we won a partial victory but we will fight on until the Thaksin regime has been driven out," he said in a speech to supporters, a reference to the influence Yingluck Shinawatra's brother, former premier Thaksin Shinwatra.
Earlier on Tuesday, the government ordered police to stand down and allow protesters into state buildings, removing a flashpoint for clashes and effectively bringing an end to days of violence in Bangkok in which five people have died.
Thailand brace for another day of protests against Yingluck Shinawatra
(PTI) Thailand braced itself for another round of anti-government protests by opposition parties who have vowed to seize the Police headquarters here today in an attempt to oust Prime Minister Yingluck Shinawatra.
However, the metropolitan police in Bangkok has said that they would allow the protesters to seize the bureau.
Metropolitan Police Bureau Commissioner Pol Lt Gen Khamronvit Thupkrajang today said that police guarding the bureau would no longer fire teargases to fend off protesters.
The protest leader, Suthep Thaugsuban, a former deputy premier and ex-MP of Democrat Party, has said protesters will "seize" the bureau by this afternoon.
Khamronvit said he had instructed police to open the line and clap to welcome the protesters when they arrive, Nation newspaper said.
"There will be no clash today. If the protesters want to seize the Metropolitan Police, let them," local daily Thai Rath quoted Khamronvit as saying.
"I've told my subordinates not to fire teargases. If anything happens, I'll take responsibility," he said.
He added that the prime minister also gave cash of two million baht for him to distribute to police officers on duty, Nation online added.
For the past week, thousands of protesters have marched in Bangkok in a bid to unseat Yingluck Shinawatra, whom they accuse of acting as a proxy for her fugitive brother and former premier Thaksin Shinwatra, who was overthrown in a coup in 2006.
Thaksin, who is in self-exile in Dubai, faces corruption charges.
The opposition Democrat Party started the protests against a controversial Amnesty Bill, the passing of which would have allowed Thaksin to return home.
The country is facing its largest protests since 2010, when thousands of "red-shirt" Thaksin supporters occupied key parts of the capital. More than 90 people, mostly civilian protesters, died over the course of the two-month sit-in.