Sources said sleuths of the National Investigation Agency (NIA), which is probing the July 7 serial blasts in one of the most-sacred Buddhist sites, have found that small cylinders attached with the unexploded bombs were manufactured in a plant in Meerut.
However, the terrorists, who planted the bombs, were believed to have procured the cylinders locally in Bihar.
Earlier, the NIA investigators had found that the clocks used as timers in the bombs were manufactured in Rajkot in Gujarat, the sources said.
The investigators have got enough indication that people with "Mongoloid features" could be involved in carrying out the explosions, the sources said, hinting that involvement of Myanmar's Rohingiya Muslims cannot be ruled out.
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There were reports that the multiple blasts were reaction to the alleged violence against minorities in Myanmar's Rakhine province.
Two monks were injured in ten blasts that took place early in the morning of July 7 in Bodh Gaya. Three unexploded bombs were found.