Dozens of people have been wounded in a bomb attack at an opposition protest march in Bangkok.
The explosion increased tensions in the Thai capital, where anti-government demonstrators seeking to oust Yingluck Shinawatra, the prime minister, have taken over seven key roads and overpasses, blocking them with walls of sandbags, tyres and steel barricades.
The authorities and demonstrators blamed each other for the blast, which was apparently caused by a grenade-type device thrown from a building.
The anti-government movement said it happened shortly before the protest leader Suthep Thaugsuban was due to pass by.
"The bomb went off about 30 metres from Suthep," a protest spokesman said afterwards.
The city's Erawan emergency centre said 36 people were hurt, including one who required an emergency operation.
"The movement is desperate," said Anusorn Iamsa-ard, a spokesman for the ruling Puea Thai Party.
"Its attempt to shut down this city has not been successful so it is trying different tactics, including staging attacks and blaming them on the government."
Despite the tension, Mrs Yingluck maintains that parliamentary elections scheduled for February 2 will go ahead. (© Daily Telegraph, London)