An enraged Chauhan then hit Saroj with a rod, the police said.
Inspector of Colonelganj police station Awadesh Pratap Singh said, "As per the CCTV footage obtained from the restaurant, they attacked Saroj mercilessly in the restaurant.
The accused, however, continued to hit him with rods and bricks in his head and body.
Soon, it led to exchange of blows the two groups started throwing chairs on each other.
One of the flying chairs hit a waiter, Munna Chauhan.