The United Nations Mission of Support in Libya ( UNSMIL) last night, expressed \"deep concern\" over the outbreak on Saturday evening of violence in Benghazi that claimed the lives of dozens of people and left many others injured. UNSMIL called on all concerned parties \"to exercise maximum restraint and reiterates the necessity of resolving disagreements peacefully through dialogue and in a democratic spirit,\" the Mission said in a statement. The international mission appealed to all Libyans to reject violence in all its forms and all acts of retaliation. \"The Mission calls on all Libyans to support national efforts to ensure security and stability throughout Libya,\" UNSMIL said in its statement. Some 20 people were killed and nearly 80 wounded yesterday when a militia in Benghazi, Libya\'s second largest city, opened fire on a group of protesters, according to media reports.