Apart from cases of extortion, drug trafficking and arms smuggling, Rajan is wanted for at least 17 murders in Mumbai.
Chhota Rajan was arrested by authorities in Bali, Indonesia soon after he arrived from Sydney on Sunday.
According to sources, the Mumbai police was not part of the plan to catch him, which involved close coordination between the Indian security agencies, mainly the CBI, and the police in Australia and Indonesia, reported NDTV.
Read More: How Chhota Rajan's cover was blown
Rajan had been under the watch of the Interpol and he is said to have been traced in Australia last July. He had remained undercover for several years, but it was said that his cover was blown away by some of his aides.
Rajan, once a close aide of Dawood Ibrahim parted his way and turned his bitter rival after the 1993 Mumbai blasts (then Bombay).
It is also believed that Rajan may provide some information about Dawod Ibrahim. Rajan's arrest has also raised a question that is he looking for safe place for him in India to escape Dawood Ibrahim, who took several attempts to kill him.