All the commuters hailed from Balewadi in Pune.
The mishap occurred at around 11.45 pm on Shivaji bridge when the driver lost control over the vehicle while travelling from Ganpatipule to Pune, an official of Kolhapur police said.
Police and fire brigade was alerted by some onlookers following which a search and rescue operation was launched, he said.
Out of the seven persons rescued from the river four were declared brought dead at a hospital while three injured are undergoing treatment, the official said.
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