The procession of Hanuman Jayanti was passing through the market of Nimaz town this evening, when few persons pelted stones on it, Superintendent of Police (Pali) K B Vandna said.
The incident led to violence and sparked communal tension in the town area.
According to sources, some houses and shots were looted and later set afire.
"We have imposed curfew in the town and have imposed section 144 of CrPC in order to keep the situation under control," IGP D C Jain said.