Ahmad, said to be an associate of the serial blasts' prime accused Imtiyaz Ansari, an alleged Indian Mujahideen (IM) operative, was then taken to the state capital by a Patna police team for questioning, Patna's Superintendent of Police (SP), City, Jayant Kant said.
The suspect was presently in NIA's custody and being interrogated about his alleged role in the serial blasts, he said.
Ahmad was rounded up for questioning in connection with the serial blasts after his phone figured in a list of contacts of Ansari, who was arrested soon after the first blast at a toilet on platform number 10 at the railway junction, police said.
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