The incident took place last night here in the home district of Chief Minister Akhilesh Yadav, when some youths entered into an altercation with the worker over payment of the bill, police said, adding, the group then resorted to damaging vehicles and set afire two shops.
As soon as the news spread, some youths who were taking out a Moharram procession joined the quarrel and clashed with the group, they said.
A large number of police personnel have been deployed in the area and the situation was stated to be under control.
