The police will also ask Kamble about who kept the threatening letter at a bench in Bandra area of Mumbai on Sunday, he said.
The police have arrested Siddhesh Hiraman Kamble, alias Mahakal, in connection with the killing of popular singer and Congress leader Sidhu Moosewala in Punjab last month, an official said on Wednesday.
A group of army jawans on Wednesday allegedly vandalised a police station in Nashik and attacked several policemen, injuring three of them, while protesting the arrest of an army officer, the police said.