Eleven people, including three policemen, were injured in a grenade attack late Sunday on the house of a former Thai prime minister in protest-hit Bangkok, police said on Monday.
One person was seriously hurt in the blast at the home of Banharn Silpa-archa, who was prime minister from July 1995 to November 1996, but most of the victims suffered only light wounds, they said.
A number of small explosions have hit politically significant sites and army buildings in recent weeks in Thailand, where 26 people have died and hundreds have been injured this month in the worst civil violence in almost two decades.
Banharn was banned from Thai politics for five years in 2008 and his party was dissolved for electoral fraud.
Another grenade attack targeted a regional police station in northern Chiang Mai province late Sunday but nobody was hurt, police said.