Deputy national police chief Ek Angsananon, who went to inspect the blast site, said CCTV camera footage captured the suspect clearly and it would be evidence to back a warrant for his arrest.
Pol Gen Ek said the suspect apparently wanted to toss the grenade into a tent behind the rally stage, which is reserved for PDRC leaders and staff and reporters, but missed the target. The device hit the roof of a nearby coffee shop and exploded.
He said he felt sorry for the bombing incident and promised to implement better safety measures for the protesters.
Pol Maj Gen Tawatchai Mekprasertkul, chief of the Central Scientific Crime Detection Division, said the gun used by the suspect was a .38 revolver. He fled into Ratchawithi Soi 14 near Khlong Samsen where he hired a motorcycle taxi driver. Police already know where he got off the motorbike.
It was too early to say if the attacker was the same person behind the Friday’s bombing on Banthat Thong road, although the hand grenades used in the two incidents were of the same type.
Police have yet to acquire information about other accomplices in the attack, said Pol Maj Gen Tawatchai.