An unidentified person fired at and injured Baba Siddiqui of the Ajit Pawar-led NCP in Mumbai's Bandra East on Saturday evening.
The former state minister has been admitted in Lilavati Hospital nearby, a police official said.
The firing took place outside his MLA son Zeeshan Siddiqui's office near Colgate ground in Nirmal Nagar, the official added.
"Two to three rounds were fired. Further probe is underway as teams have rushed to the area," the official said.
Siddiqui had recently joined the NCP from the Congress.
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