Madhya Pradesh Congress spokesman Narendra Saluja told reporters that his party workers were attacked even as police cane-charged them.
A Congress worker was injured in the incident and was admitted in state-run M Y Hospital, he said.
Congress has submitted a written complaint to police demanding registration of a case under relevant sections of IPC against the security guards concerned.
Meanwhile, Police said Congress workers were staging a violent protest despite the model code of conduct in force ahead of the November 25 Assembly elections.
A police constable was injured in the incident, they claimed.
