Thai police say Bangkok bomb substance 'looks like TNT,' but still waiting for test results

Thai police spokesman Prawut Thawornsiri speaks at a news conference in Bangkok, Thailand, Wednesday, Aug. 26, 2015. More than one week after the Aug. 17 bombing at the capital's revered Erawan Shrine, which left 20 people dead and more than 120 injured, police appeared no closer to tracking down suspects or determining a motive for the attack. (AP Photo/Penny Yi Wang) (The Associated Press)

Phra Phrom, the Thai interpretation of the Hindu god Brahma, which was damaged after last week's bombing at the Erawan Shrine at Rajprasong intersection, is covered as repairs take place in Bangkok, Thailand, Wednesday, Aug. 26, 2015. More than one week after the Aug. 17 bombing at the capital's revered Erawan Shrine, which left 20 people dead and more than 120 injured, police appeared no closer to tracking down suspects or determining a motive for the attack. (AP Photo/Penny Yi Wang) (The Associated Press)

A worshipper, right, places garlands of marigolds as a worker clears earlier offerings at the Erawan Shrine at Rajprasong intersection, in Bangkok, Thailand, Wednesday, Aug. 26, 2015. More than one week after the Aug. 17 bombing at the capital's revered Erawan Shrine, which left 20 people dead and more than 120 injured, police appeared no closer to tracking down suspects or determining a motive for the attack. (AP Photo/Penny Yi Wang) (The Associated Press)

Thailand's national police spokesman says that according to explosives experts the bomb that blew up last week in downtown Bangkok "looks like TNT," although police have not received the chemical test results.

Prawuth Thavornsiri told journalists Wednesday that it was still not clear if the bomb that killed 20 people Aug. 17 was made of TNT or C4, a plastic explosive, but based on the experience of the bomb disposal experts, "they say it looks like TNT."

Prawuth says investigators are trying to find other pieces of the bomb to analyze.

More than a week after the bombing, police appear to be no closer to tracking down suspects or determining a motive for the attack.