An activist of the outlawed SIMI, Abdul Halim was on Monday interrogated in connection with the serial blasts by the city police which conducted raids overnight and detained several persons for questioning.
"Those who have been detained by us are being questioned at present. Abdul Halim, a SIMI activist, who was arrested in connection with the blasts, is also being questioned and he is likely to be produced in court for remand," Joint Commissioner of Police (crime branch) Ashish Bhatia, who is heading the probe, said today.
Halim was allegedly involved in recruiting people for Jehadi activities, police said.
Raids were conducted in different part of Ahmedabad by the police last night and many people were detained for questioning, Bhatia said.
The crime branch is also tracking cycles used in the serial blasts held in the city on Saturday. As per police sources, most of the cycles used in the blasts were second-hand ones.
The police questioned some of the cycle dealers of the city to find a lead, the sources said.
Police were also talking to a person who claimed that he had seen suspected bombers parking cycles in Raipur area here, they said.
Police in Surat sent material from two cars found packed with explosives to a forensic laboratory for tests. "We have no found any leads so far about those behind the planting of explosives in Surat city. Several people have been detained for questioning," Surat Police Commissioner RMS Brar said.
The 16 blasts in a span of about 70 minutes in Ahmedabad on Saturday left 49 people dead and over 145 injured.