Police said that two persons, identified as Ratnesh Kumar and Inder Singh, have been arrested for allegedly attacking JIT executive engineer Yogwinder Singh.
The search is on for another three unknown assailants, police added.
Yogwinder had gone to the city's No.9 Basti in the morning to remove illegal shops when the incident took place. The official sustained some injuries in the attack for which he has received treatment, police said.