Thai Prime Minister Yingluck Shinawatra has rejected protesters' demands that she resign before February's snap elections.
Demonstrators have been calling for Yingluck Shinawatra to resign and be replaced with a "people's prime minister".
Ms Yingluck won the last polls in 2011, but protesters say ex-leader Thaksin Shinawatra remains in charge.
Thailand is facing its most serious political turmoil since 2010.
Speaking to reporters on Tuesday, Ms Yingluck urged protesters to stop and "use the electoral system to choose who will become the next government."