The Anti-Terrorism Squad (ATS) arrested the man, who made threat calls to Shiv Sena's Sanjay Raut in Kolkata.
The accused had also made calls to residences of other big Maharashtra politicians including CM Uddhav, according to Mumbai Police.
Mumbai DCP (ATS) Vikram Deshmane said, "We traced threat call made to Sanjay Raut, to a person in Kolkata.
Preliminary inspection indicated his possible involvement in earlier threat calls made to other politicians as well.
He is in transit and will be produced before a court on Sep 14."
