Thousands protested in Bangkok, demanding Prime Minister Paetongtarn Shinawatra's resignation following a leaked phone conversation.
The leaked call, involving former Cambodian leader Hun Sen, sparked outrage over her perceived appeasement and handling of a border dispute.
This incident ignited widespread anger, particularly among conservative royalist groups, leading to large-scale demonstrations across the city.
The controversy has significantly weakened Paetongtarn's coalition government, potentially leading to its collapse and fresh elections.