Thai riot police gather at Government House in Bangkok.
Thai police today had to use tear gas and water cannons to prevent protesters from trying to break through the fence and cut the barbed wire protecting the Government House, AFP said.
Female Prime Minister Yingluck Shinawatra was not present in the building.
`We are all brothers and sisters,` the police said loudly through the loudspeaker system.
According to AP news agency, about 1,000 protesters faced riot police at Government House.
Protesters poured water on a person whose skin was burned by police tear gas.
Tensions in Bangkok began to rise after violence appeared near a stadium, where thousands of red shirts gathered, late yesterday.
`One student and two red shirts were killed,` said Deputy National Police Chief Worapong Siewpreecha.
The violence that occurred caused the red shirt leaders to end their protests.
The number of protesters decreased significantly compared to when they began on November 24, but they still pursued the goal of occupying government agencies.
The opposition leader today announced the continuation of marches to key areas such as Government House, headquarters of main television channels and police headquarters.
`Our activities today must be carried out peacefully and without violence,` said Suthep Thaugsuban, opposition leader.
The Thai government is mobilizing more than 2,700 soldiers to ensure security in the capital Bangkok.
The protest began after a law said to create conditions for ousted former prime minister Thaksin Shinawatra to return was passed by the House of Representatives on November 2.