Two guards Gulab Singh (40) and Ramesh (38) had a dispute over some issue after which they opened fire on each other, said Munna Lal, Additional Superintendent of Police.
Gulab, Ramesh and worker Ritesh (18) were injured in the firing, he said adding, they were taken to a primary health center and then referred to Lucknow.
While Gulaab died on the way, Ramesh's condition is stated to be serious, he said.