The incident took place late last night when accused Sumedh Karandikar, also a local leader of Kamghar Sena--opened fire on the elderly woman inside the bus after an altercation broke out between them over some issue.
According to police, Karandikar shot at the woman identified as Paravati Thakur from point blank range, injuring her severely. She was rushed to a private hospital where she is being treated.
The assailant, who is allegedly her son-in-law, was over powered by the co-passengers after which he was arrested and booked under section 307 of the IPC and also sections 3,25 and 27 of the Arms Act.
The accused is said to be associated with New Hindustan Kamghar Sena, which is affiliated to the Shiv Sena.
Kasarwadavali police are carrying out further probe into the crime.