Santosh Pathak was attacked on Monday night when he went to Hanuman Nagar police station highway area to take part in a meeting being held there, Superintendent of police Shailesh Kumar Pandey said.
Former SP leader Devendra Gautam alias Guddu Gautam reached there and opened fire on Pathak leaving him injured, he said, adding, Gautam fled from the spot after the incident.
Forensic team has collected evidence from the spot, police said.
Pathak has been admitted to hospital and a hunt is on to nab Gautam, they said.