Sanjay Mondal was allegedly shot dead on Sunday evening just for asking Rs 190 for the plate of biryani from four customers.
Police said they have arrested one person and search for other co-accused is on.
"The tussle started over a plate of Biryani and one of the customers shot Sanjay Mondal. He was taken to a hospital where he was pronounced dead. An FIR was lodged and we have arrested accused Mohammad Firoz," the police said.
"As of now we think it is related to biryani only but our investigation is on."
Mondal's brother said: "Firoz shot my brother. There were four people: Raja, Firoz, Mogri and Salman. They are hooligans. We all are very scared and don't know how to run our business peacefully."