A grenade attack at the Bangkok home of a former Thai prime minister wounded a woman late on Sunday, the latest in a series of explosions during mass anti-government protests, police said.

The blast occurred shortly before 10:30 pm (0330 GMT) by the house of Banharn Silpa-archa. The woman, who was walking along the street nearby, suffered minor injuries, police said.

Banharn, who was premier from mid-1995 to late-1996, is now chief adviser to Chart Thai Pattana, one of the parties in the government coalition led by Prime Minister Abhisit Vejjajiva.

Street demonstrations under way for more than a fortnight to demand snap elections have passed off peacefully but the capital has been hit by a string of blasts at government and army buildings.

A dozen people were injured over the weekend when grenades were lobbed at the gate of the barracks where Abhisit has been living and working since the protests began.