A team of policemen yesterday inspected areas around Bang Phlat intersection where a Daewoo sedan was intercepted and found to be loaded with explosives on August 24. They examined various sites where they believe a suspect who was supposed to activate a remotely-controlled detonator could have been hiding on the day.

They also placed an electronic device in a white pickup truck, parked exactly where the Daewoo sedan was stopped, and scattered many officers with remote control units within a 150-metre radius of the pickup, to test their radio signals. The results of the test were not revealed. Footage from television news coverage was examined by police experts to find out whether any of the five suspects were at the scene or appeared in areas adjacent to the intersection. Another police team examined a bronze Nissan owned by Lieutenant Thawatchai Klinchana, the driver of the Daewoo sedan, to search for more evidence. The vehicle was parked inside the Internal Security Operations Command, where Thawatchai was assigned to work.

Central Investigation Bureau chief Pol Lt-General Montree Jamroon said the police were verifying information provided by Sgt-Major Chakhrit Janthara against the other four suspects. He did not say whether Chakhrit had made any new revelations.

Nithikorn Nonthasawas, a lawyer representing Thawatchai, said members of his client's family had received phone calls from "influential individuals" trying to persuade them to convince Thawatchai to reveal more information about the murder plot.

Thawatchai, Colonel Suraphol Supradit and Lt-Colonel Manas Sudprasert are in military custody after refusing to cooperate with the police investigation, while Maj-General Phairoj Theerapharb has been released on bail. Chakhrit remains in police custody.