The injured, who were shot at, are undergoing treatment at a hospital here. The last evening clash was between groups from Bhadoda and Moghpur villages under the Sikheda Police Station, Superintendent of Police (SP) Ombir Singh said.
The police have registered a case against several people.
The girl was allegedly eve-teased when she was going with her brother on a bike to college, the officer said.
The brother was beaten up when he opposed the alleged eve teasers, he said.
Following the incident, groups from either side gathered at the spot and fired on each other. The situation was brought under control by a police team, Singh said.
Security has been tightened in the area and police personnel have been deployed, the SP said.