Bangkok ( CNN ) -- Thousands of anti-government demonstrators kept up pressure on the Thai government Wednesday by surrounding more official buildings amid the highest tensions the country has seen since deadly unrest three years ago . The protesters in Bangkok continued to occupy the finance ministry building , which they stormed Monday and turned into their secondary command center . They plan to send groups to a range of other ministries and government offices around the capital Wednesday , said Akanat Promphan , a spokesman for the protesters . Their objectives include the public health , labor , industry , social development and science ministries , as well as a government complex that houses multiple agencies , notably the Department of Special Investigation . The number of demonstrators , led by the opposition Democrat Party , has declined from the huge gathering of roughly 100,000 people that assembled in Bangkok on Sunday . Akanat said the protesters believe their current numbers to be in the tens of thousands , perhaps as many as 50,000 . But authorities estimate the number of demonstrators to be 10,000 , said Lt. Gen. Paradon Patthanathabut of the National Security Council . Certain sections of some roads in Bangkok have been shut down because of the number of protesters camping out and spilling into the street , Paradon said . Amid the tensions on the streets , Prime Minister Yingluck Shinawatra faces a no-confidence motion in parliament put forward by the opposition as it tries to unseat the government through legal means . A vote is currently scheduled for Thursday , but the opposition 's chances of success appear slim , as Yingluck 's party has a majority . Protesters are calling for an end to the government of Yingluck , sister of former premier Thaksin Shinawatra , the telecommunications tycoon who was ousted in a 2006 coup . Critics of the Thai prime minister accuse her of being a puppet of her older brother Thaksin , a deeply polarizing figure who was removed from power by the military while in New York in 2006 . He has since lived in exile , except for a brief return in 2008 , and was convicted by Thai courts for corruption and sentenced in absentia to two years in prison later that year . More than three weeks of anti-government protests led by the Democrat Party rose to a crescendo with the big demonstration Sunday . The protesters have since taken their rallies directly to government offices , TV networks and military installations . At various points during the past few days , demonstrators have surrounded the foreign ministry , as well as the agriculture and interior ministries . Yingluck has said authorities will `` absolutely not use violence '' to disperse the demonstrators . But the situation is delicate after Thai police issued an arrest warrant against protest leader Suthep Thaugsuban . Paradon of the National Security Council said Wednesday that authorities are `` sticking with negotiation '' and trying to persuade Suthep to hand himself in . Authorities have extended the areas around Bangkok where police are enforcing an internal security law that restricts gatherings by demonstrators . The current protests have reanimated the tensions along Thailand 's political fault lines -- Thaksin Shinawatra 's mostly rural support base on one side , the Bangkok-based elite and middle classes on the other . The same division left the country wracked with turbulence for four years after the 2006 coup , culminating in a 2010 army crackdown on Thaksin supporters that left more than 90 dead . The current protests are in response to a government-backed amnesty bill that could have extended a pardon to Thaksin Shinawatra and opened the door for his return to Thailand . The Thai senate rejected the amnesty bill on November 11 , but demonstrations continued , with the opposition calling for the current government to be replaced by a new administration . More than a dozen countries have issued travel warnings for citizens to avoid areas near protests in Bangkok . CNN 's Anna Coren contributed to this report .
Demonstrators say they plan to march to multiple government offices . They want Prime Minister Yingluck Shinawatra 's government to step down . The number of protesters has declined from a huge gathering Sunday . Yingluck is facing a no confidence motion in Parliament , where she has a majority .