The autopsy of the victims showed that the impact of the explosion was felt more in 2007 than it is now though the victims had similar injuries, the expert, who was involved in both the investigations, said.
"Iron particles were found inside the bodies of the victims.We found nuts, bolts, nails, pieces of glass then and also now," the expert told PTI.
In the twin blasts that hit Dilsukhnagar area of Hyderabad yesterday, 16 people were killed and 120 injured.