Bangkok has been shaken by more than a month of mass opposition demonstrations aimed at ousting Prime Minister Yingluck Shinawatra and ridding the kingdom of the influence of her older brother, deposed former leader Thaksin.
On Monday Yingluck called an early election -- set for February 2 -- to try to calm the political turmoil. But opposition leader Suthep Thaugsuban rejected the move, demanding the government step aside in favour of an unelected "people's council".
"If you choose Suthep's side, you choose absolute dictatorship," Red Shirt leader Nattawut Saikuea said at a press conference today.
"If you don't accept what Suthep does you must cast a vote -- this is not a mission for the Red Shirts alone, but the entire Thai people," he said.
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Thailand has seen several bouts of political turmoil since Thaksin was ousted in a military coup in 2006, with rival protests spilling into the streets in sometimes bloody unrest.
The coup-makers who ousted her older brother Thaksin seven years ago realised that it "doesn't solve any problems", she said.
"I don't think the military will do that again," she told foreign reporters.
Thailand has seen 18 actual or attempted coups since it became a constitutional monarchy in 1932.
But army chief General Prayut Chan-O-Cha said last week problems should be "solved by politics".
The political conflict broadly pits a Bangkok-based middle class and a royalist elite backed by the military against rural and working-class voters loyal to Thaksin.
But critics say he controls his sister's government behind the scenes.
Parties allied to the tycoon have won every election since 2001, most recently with a landslide victory for Yingluck's Puea Thai in 2011.
Yingluck criticised the protesters for ignoring the voice of her rural supporters.
"I came from the people's election of 16 million votes but nobody listens (to them)," she said.