The police fired tear gas shells to control the mob.
"A mob of around 400-500 people had gathered at the highway connecting Ahmedabad and Unjha at Brahmanwada village to block the road," said Mehsana Superintendent of Police Chaitanya Mandlik.
The call to block the road was given by Kshatriya Thakore Sena - a group of Thakor community headed by OBC leader Alpesh Thakor - to protest alleged attack on members of their group by a bootlegger at Sidhpur bordering Patan district.
He said three police constables sustained injuries in the incident.
"The protesters were demanding action against a bootlegger who had attacked members of the Thakor Sena at Sidhpur in Patan district. We managed to disperse the crowd but it left three constables injured," the officer said.