Members of a land rights advocacy group have vowed to camp near Government House until Prime Minister Prayut Chan-o-cha steps in to resolve over 160 land disputes between villagers and the state.
The People's Movement for a Just Society, or P-Move, on Monday petitioned the prime minister to immediately set up a committee to resolve 168 land rights cases across the country.
The group's representatives said they decided to petition Gen Prayut because he had promised to establish such a panel to settle the cases.
However, the movement's leader, Chamnong Nuphan, said the group had waited and there had been no clear indications that the government would set up the panel as promised.
Mr Chamnong declined to say how long the protest will last, but said the group will leave as soon as it sees a "good and sincere response" from the government.
"We believe land and housing disputes stem from economic disparity and bureaucratic mismanagement," he said.
"The government needs to pay attention to these issues and send capable and competent representatives to the negotiating table."
He also encouraged activists and villagers across the country to support the movement by pressuring ministries overseeing public land to work together to address the root causes of the many problems.
P-Move supporters, including villagers from areas in dispute, have put up tents and set up a makeshift market to sell vegetables and fruits brought from their areas next to the United Nations building on Ratchadamnoen Nok Avenue.
In May last year, the group decided to end its 10-day protest in Bangkok when the government finally agreed to sign a memorandum of understanding to solve land disputes between villagers and forest officials.