The 45-year-old son of a Thane Shiv Sena (UBT) leader died of a heart attack during an argument with an autorickshaw driver in Vasai in Palghar district, after which police registered a case of culpable homicide not amounting to murder against an unidentified person, an official said on Monday.

Milind More, son of Raghunath More, former Thane district chief of the undivided Shiv Sena, was at a resort in Navapur with his family when the incident took place late Sunday evening, Deputy Commissioner of Police Jayant Bajbale said.

"While moving out of the resort, he had an argument with a rickshaw driver, during which he collapsed and was rushed to a nearby hospital. Doctors there declared him dead on arrival and opined heart attack as the prima facie cause," he said.

Based on the complaint More's kin, a case was registered under section 105 (culpable homicide not amounting to murder) under the Bharatiya Nyaya Sanhita against an unidentified person, the DCP added.

Milind More is the deputy chief of the Thane unit of the Shiv Sena (UBT), party functionaries said.

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