Police yesterday arrested four people allegedly for unauthorised possession of explosives and firearms, found while their pickup truck was stopped at a checkpoint.
A police spokesman said later they had nothing to do with a grenade attack on the home of former Democrat Party leader Abhisit Vejjajiva.
Pol Maj-General Adul Narongsak said unspecified explosives found in the vehicle were of a different kind than those used to target Abhisit's home.
Charged were three men – Suna Thinkaew, Anusorn Phinijkhun and Khamphrai Saengsawaeng – and one woman, Thanapha Denmart. Apart from explosives, a pistol and bullets were also found in the vehicle.
Meanwhile, four policemen in plainclothes were attacked and robbed on Tuesday night near Chulalongkorn Hospital by guards attached to the anti-government PDRC, a police spokesman said yesterday.
The four officers, attached to the Special Branch Bureau, sustained injuries and lost a number of personal belongings and a service motorcycle, said Pol Maj-General Adul Narongsak. Police are looking into the attack to find possible suspects.
The victims were on duty near the hospital and were forced at gunpoint by the attackers to move to near the PDRC rally stage at Lumpini Park.
They claim to have been beaten up, tasered and had their soles burned with lighters, before being released.