"As of now we have not found any circuit, battery, remote-control device, shrapnel or splinters. We are not able to ascertain the nature of explosives used in the blast," said Uttar Pradesh Additional Director General of Police Brij Lal.
"Whatever remnants we have got are being examined by forensic experts. It is only after the chemical analysis that we would be able to confirm the nature of explosives," he said.
Asked if police had found any evidence against the Indian Mujahideen, which claimed responsibility for the attack, Lal said: "At present, we have not found involvement of any organisation, module, individual that can be linked with the blast."
The terror strike Tuesday evening when hundreds were watching the 'maha aarti' -- when devotees float numerous earthen lamps on the river -- also injured over 30 people.