Two more Interpol experts joined on Thursday the three in the capital to help the August 21 grenade blast probe.
Robert M. Thompson, a fire tool-mark examiner and Frev J. Bredford, an explosive enforcement officer, both from the US, flew in Dhaka to intensify the probe of grenade blasts on Awami League rally that killed 19 and injured over 200.
The two spent a busy day visiting major spots and talking with local and Interpol investigators.
They also visited the spot on Bangabandhu Avenue and examined the truck kept at Police Control Room at Shahbagh. Grenades were hurled at the truck, which was used as podium by the central AL leaders.