Police said that Hyder Ali died after sustaining five bullet wounds.
The second person, Ullas Jana, suffered bullet wounds when he went to rescue Ali from the motorbike-borne assailants this evening at Nayabasti.
Ali was declared dead at a local hospital while his party colleague Jana has been admitted to RG Kar Medical College and Hospital, police said.
Ali was a leader of Panihati town Trinamool Congress.