About 100,000 anti-government protesters have gathered in Thailand’s capital, Bangkok. They are demanding that Prime Minister Yingluck Shinawatra step down amid claims that her government is controlled by her older brother, ousted former leader Thaksin Shinawatra.

The protests, led by the opposition Democrat Party, mark the biggest demonstrations since deadly political unrest in 2010. Organizers say they expect the rally to continue overnight. Thaksin Shinawatra is seeking to return home without serving his two-year jail sentence for corruption.

The latest round of demonstrations was triggered in October by a government-backed bill that could have granted him amnesty. The protests have forced the government to abandon the amnesty effort, at least temporarily.