Amarpal Jatav, 40, was going to his house in an auto rickshaw after attending a party function. Three bike-borne men intercepted the vehicle and opened indiscriminate fire at Jatav.
"After shooting him, all the three accused fled from the spot. He was immediately rushed to a nearby hospital where doctors declared him brought dead," a senior police officer said.
Jatav was district secretary of BSP and lived with his family in Loni area.
The officer said that Jatav received around seven bullets in his body which led to his instant death.
Police have formed a team to investigate the BSP's leader murder case and all accused would be arrested soon, officer added.