The Gurdwara, where some construction work was going on, is located on the busy GT road, police said.
"Dheeraj, a labourer hailing from Uttar Pradesh's Sitapur district has died in the incident," an official of the Civil hospital said.
He said some of the injured have been referred to various hospitals including at Delhi and Karnal.
As the Gurdwara is located on the busy National Highway 1, the collapse resulted in a traffic jam.
Deputy Superintendent of Police (Panipat City) Atma Ram said rescue operation was launched immediately after the incident.