The police on Wednesday detained a person in Sawantwadi in connection with the serial blasts in Mumbai's suburban trains on Tuesday.
The suspect, only identified as Baig, was picked up for interrogation, police sources said.
They, however, refused to divulge any further information saying interrogation was still on.
Meanwhile, the Anti-terrorist cell conducted searches at the residence of an Aurangabad doctor.
The police conducted searches at the residence of the doctor in Nandanvan colony at around 9 pm, sources said.
They, however, refused to divulge details regarding the searches.