The accused claimed that they were supporters of one Rajesh Kumar who contested the MCD elections from a ward in Sangam Vihar, it said.
The victim, Kaptaan Singh, resides in the same street as Kumar but did not support him. They thought that Kumar lost the elections because of Singh and attacked him on April 28, the police said.
The accused were identified on the basis of CCTV footage
From the footage, a person named Faisal alias Abid was identified with the help of beat staff. He was arrested from Tigri area and two of his other accomplices, Rajesh alias Dhansu, Ajay alias Uma Shankar were also arrested.
One person is absconding. The victim is a Trained Graduate Teacher in a government school in Khanpur in the evening shift.