According to the charge sheet of the case, Maulana Tajuddin, a leader of banned militant outfit Harkat-ul-Jihad Bangladesh (Huji), supplied 15 grenades. Among the bombs, 14 were thrown at the AL rally on August 21, 2004. 3 were found unexploded and another one was found near the old central jail in Dhaka. 

An unexploded grenade amid shoes and a victim after the attack on August 21, 2004 that left 24 dead and more than 300 injured. File Photo

Here are some details on the grenade

Name: Arges-84

Type: Hand grenade

Action: Time fuse explosive

Origin: Arges, Austria

An unexploded grenade amid shoes and a victim after the August 21 attack that left 24 dead and more than 300 injured. Photo: File

Made in: China

Weight: over 1kg

Size: Largest in its production line

Exterior: Smooth

Splinters: Around 36,000 per granade

Blast radius: Detonation can propel shrapnel over 90 metres. 

Damage: Inflicts massive damage to soft targets within blast radius. 

Source: Military Factory