A grenade was lobbed into the compound of the house of Samran Rodphet, a key member of the People's Democratic Reform Committee, early Tuesday, police said.
No one was injured in the attack, which happened at 3am and caused a shallow hole in the compound. The blast’s impact shattered the house’s windows and a light in front of the house and also damaged a car.
Police found the grenade pin and some fragments at the scene.
Pol Col Kamthorn Uicharoen, chief of a bomb disposal unit, said the bomb was an M67 grenade with a lethality radius of 15 metres.
Kamthorn said it was the first time the M67 has been in the attacks following the PDRC rallies.
He said the attacker definitely lobbed the grenade from the road in front of the house at the house and it fell near the wall.
Pol Col Phaisarn Wongwatcharamongkol, the commander of Khannayao police station, said Samrarn’s wife, Wandee Rodphet, 35, and her maid were sleeping and were woken up by the explosion. However, they chose not to come out to check on its cause immediately.
The wife told police that Samran had not returned home for more than a month since he joined the PDRC rallies.
Police will check video feeds of surveillance cameras in the area, the police station chief said.