"The incident took place this morning when the procession of 21st Ramzan with 25,000 people was being taken out in old city by Shia community", IG (Law and Order) R K Vishwakarma said.
The situation took an ugly turn when some persons threw stones from Farzan Ahmad's house leading to stone-pelting and arsoning in which a shop was set afire and eight vehicles, including two trucks, were damaged by the angry mob, he said.
Later, police resorted to lathicharge to control the situation, Vishwakarma said, adding that no one suffered major injuries in the incident.
Asked about any arrests or detention of those involved in the incident, Vishwakarma said that the probe was on and strict action would be initiated against those responsible.
Shia Personal Law Board Yasoob Abbas told PTI that a number of people, including women and children, were injured in the incident and also in the police lathicharge.
He demanded immediate action against those responsible for the violence.