Dehradun: An explosive device kept in a pipe had caused the blast in Roorkee recently in which a 12-year-old schoolboy was killed, a senior police official on Tuesday said.
The Saturday explosion in Roorkee was caused when an explosive device kept in a pipe went off, Haridwar SSP Sweety Aggrawal told PTI.
Investigating agencies including the NIA and Uttar Pradesh ATS which have joined in the probe with Uttarakhand police are also looking into whether the explosion had links with the recent blast in Bijnore in neighbouring Uttar Pradesh in which a similar explosive device seems to have been used, she said.
However, it is premature to say whether the explosion in Roorkee was in any way linked with the blast in Bijnore, she said adding investigations are on.
Over a dozen persons have been interrogated so far in connection with the explosion but the probe so far has not thrown up any major lead, the SSP said.
Meanwhile, restrictive orders under section 144 have been imposed in Roorkee which will remain in force till December 14, Additional SDM Mohammad Nasir said.
So long as section 144 is in force in the town no public rallies could be held there without permission of the district administration, he said.
The boy was killed when an object he had picked up from a roadside garbage heap went off in his hand.
The site of the blast was just about 100 metres away from a ground where a VHP programme was in progress.