The blast triggered by an IED planted in a bike parked in front of the Faraskhana police station in the heart of the city left five people injured.
Talking to reporters here, Chavan said the motorbike on which the IED had been planted was reported missing from Satara.
"The vehicle was reported missing on June 25 and used to carry out the IED attack," he said.
It would be wrong to speculate about identity of culprits and their intentions at this juncture, the CM added.