Tension gripped the Palakurti market yard in the Warangal district when supporters of the TDP and the TRS indulged in stone-throwing during the visit of Telangana TDP leader Errabelli Dayakar Rao.
In the incident, some 10 TDP workers, five TRS activists, two lensmen and a police constable sustained injuries.
Trouble began when the TRS supporters tried to stop Errabelli, which led to clashes between the supporters of the two parties. Police took Errabelli Dayakar Rao into preventive custody.
Palakurti Sub-Inspector Usman Sharif was injured grievously in the incident, and there was tension in the village.