Thousands of protesters surrounded Thailand's Interior Ministry and forced the evacuation of four others on Tuesday, intensifying their campaign to bring down the government of Prime Minister Yingluck Shinawatra.
The protesters defied a tough security law imposed late on Monday, after they had stormed two other ministries, to control demonstrations against Yingluck and her billionaire brother, former premier Thaksin Shinawatra.
(Read more: Spotlight on Thailand as political strife escalates)
Suthep Thaugsuban, the protest leader and a former deputy prime minister under the previous government, urged supporters to mount more blockades of government buildings on Wednesday, not only in Bangkok but across the country.
"Go to every ministry and make sure they are all surrounded, so they can no longer work for the Thaksin regime," Suthep told tens of thousands of flag-waving protesters in a late night speech at the Finance Ministry they have occupied.