Three others of the band also sustained injuries, they said.
The orchestra party, hailing from West Bengal, was performing live on a moving tractor trolley at Kalyanpur village when the incident occurred, a police official said.
All seven of them came in contact with a high-tension wire during the performance, Bhore Police Station Officer-in-Charge R K Rai said.
The injured persons have been admitted to a local hospital, he added.
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