Explosive substances have been found at home of Bhumjaithai party headquarters bomb plotting suspect, Department of Special Investigation DirectorGeneral Tharit Pengdit said on Monday.
Police searched the home hired by Varissriya Boonsom, a suspect in the bombing incident recently and found traces of RDX explosives in several spots, especially on the table where the bombs were assembled and on the floor.
RDX is royal demolition explosive and also known as cyclonite or hexogen.
Tharit said the finding of the RDX explosives was consistent with Varissriya's testimony that bombs had been assembled in her place.
He added that the department has invited the Central Institute of Forensic Science Director Pornthip Rojanasunand to provide more detail to investigators on Tuesday.
Varissriya and another suspect Korbchai Boonplod were arrested by Cambodian authorities and recently extradited to Thailand to face legal action for allegedly involving in the bomb attack at the party headquarters on June 22.
However, Varissriya had claimed she was not involved in the attack although she gave shelter to other suspects and a notebook with handwritten bombmaking notes was found in her baggage.
Regarding the clarifications on suspicious financial transactions between June 28 and July 9, Tharit said three persons, exprime ministry Thaksin Shinawatra, red shirt leader Chinawatra Haboonpad and provincial assemblyman Samroeng Prajamrue, failed to report and make clarifications to investigators.
Tharit said they can still report or send their representatives to clarify the matter with the investigators in the second batch of clarifications which will begin on Tuesday.