At least one person has been killed in an explosion at an anti-government rally in Thailand’s south-eastern Trad province.
At least four more have been wounded.
Police said gunmen shot at a stage and threw two explosive devices at the rally about 300 kilometres east on Bangkok.
Protesters claim Prime Minster Yingluck Shinawatra is being controlled by her billion brother, Thaksin, toppled from power in 2006.
They want to fight corruption and remove the Shinawatra family’s influence from Thai politics.
This week they targeted businesses linked, or once linked, to the wealthy Shinawatra family, sending stock prices tumbling.
Meanwhile supporters of Yingluck promised on Sunday to get tough
with anti-government protesters, raising tensions in a political conflict that has gripped Thailand for eight years.