The incident took place late last night after the function at a private farmhouse got over and the workers were shifting their items, they said.
"After the party was over, the members of the catering party were shifting their items. Five members were carrying the chimney which touched a 11,000 KV high tension line passing from above killing all of them on the spot," Assistant Commissioner of Police (Vaishali Nagar) Lakhan Singh said.
Singh said the bodies were sent for post mortem.
"A case has been registered against the organisers of the party and the matter is being investigated," he said.