At least one person has been killed and three wounded by gunfire after clashes broke out between rival protesters in the Thai capital Bangkok.
People heading to a pro-government rally were attacked by students, and later shots were fired.
Saturday is the seventh day of protests aiming to unseat the government of Prime Minister Yingluck Shinawatra. Protesters claim her government is controlled by her brother, exiled former leader Thaksin Shinawatra.
On Saturday, what had been largely peaceful demonstrations turned violent outside a stadium where a pro-government rally has been confined during this week to avoid clashes with the anti-government protests moving around the city, the BBC's Jonathan Head
reports from Bangkok.
A group of students attacked vehicles bringing government supporters to the stadium - windows were smashed, and some minor injuries reported. Later, shots were fired, but it is not clear yet by whom. Police reinforcements were sent to the area and roads
blocked, but skirmishes between the two sides continued for several hours.
Police have called for military backup to reinforce security in the city.