Anti-government protesters in Thailand have begun demonstrations across the capital in a bid to bring the city to a standstill, a move they call "Bangkok Shutdown".

Protesters have blocked roads in key areas of Bangkok and set up camps in parts of the capital to stage sit-ins. The campaigners have also vowed to cut off power supply and prevent government officials from working, as part of the shutdown.

The government has deployed 18,000 security forces across the capital to avoid any untoward incident. The authorities are likely to declare a state of emergency if the situation worsens and have warned against any violence.

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An anti-government protester waves a Thai national flag at the Victory Monument in Bangkok as thousands of anti-government protesters sought to parlayse Thailand's capital, stepping up pressure on Prime Minister Yingluck Shinawatra to resignReuters
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Anti-government protesters cheer as they occupy a major intersection in central BangkokReuters
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Protest leader Suthep Thaugsuban waves to supporters as they leave to start their march from the Democracy MonumentReuters
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Thousands of anti-government protesters march in central BangkokReuters
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Soldiers gather around Thai army tanks at a military base in Bangkok. The Royal Thai Army moved military hardware into Bangkok ahead of an exhibition for national Children's Day, according to the militaryReuters
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An anti-government protester stands behind a barricade at a major intersection in the Thai capitalReuters
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Riot police officers showcase teargas and rubber bullets, the only type of weaponry authorities say will be used for crowd-control situationsReuters
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A Thai man joins anti-government protesters as they occupy parts of central BangkokReuters
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Students cheer as thousands of anti-government protesters march past their school in BangkokReuters
An anti-government protester wears a mask in national colours as he joins others blocking a road in the capitalReuters
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A boy holds a candle as people form a peace sign during an anti-violence campaign in BangkokReuters
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A woman looks out of her tent after waking up in the anti-government protesters' encampment near the Democracy MonumentReuters
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Buddhist monks join anti-government protesters during a blockade of a major intersection in central BangkokReuters