Police have used water cannon and tear gas against large groups of anti-government protesters in Thailan's capital Bangkok.
More than 1,000 protesters were seen attempting to rip down concrete barriers outside Government House but were pushed back by police, the Associated Press reports.
It follows a week of tensions between pro-and anti-government groups as the latter aim to topple the government of Prime Minister Yingluck Shinawatra.
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Two members of the public were injured along with two police officers who were in the unmarked vehicle.