At least 12 people were injured in a fierce clash between two rival groups in the premises of sessions court in Gujranwala on Saturday. Police sources said members of the two rival groups who came out of the court after the hearing of a murder case initially started abusing each other and later started fighting. They freely used fists, slapped and kicked one another and also hurled stones which led to 12 people being injured, five among them critically. The injured were rushed to nearby hospitals. The Civil Lines Police reached the spot and arrested 15 men involved in the brawl and registered separate cases against them for creating a law and order situation.