Unidentified people opened fire at the convoy of the newly elected Aam Aadmi Party legislator Naresh Yadav in Southwest Delhi when he and his supporters were returning home after visiting a temple after his victory, killing a party volunteer, police and a senior AAP leader said.
The firing incident happened in Kishangarh village late Tuesday night.
Police said they have detained a person for questioning and the incident appears to be a case of personal enmity. Sources said seven rounds were fired at the MLA's convoy.
Another person injured in the incident has been admitted to a hospital.
AAP leader Sanjay Singh identified the dead party volunteer as Ashok Mann.
"Convoy of MLA Naresh Yadav attacked in Mehrauli, Ashok Mann killed. Naresh Yadav was returning home after visiting a temple," Singh said in a tweet in Hindi.
"At least one volunteer has passed away due to bullet wounds. Another is injured," AAP tweeted.
Ankit Lal, AAP's social media in-charge, added that miscreants in another car opened fire on the MLA's convoy near Fortis Hospital.