Twin blasts hit Makhachkala, the capital of the southern Russian republic of Dagestan leaving 14 people were injured, among them two police officers, Russia Today reported Friday. The first explosion occurred when a grenade launcher was fired at the second floor of a restaurant, said a spokesman for the Dagestani police as cited by Itar-Tass. The second blast came from a parked car near the restaurant. Police said that the explosive device that detonated near the restaurant was not packed with shrapnel. “An investigative team is currently operating at the scene establishing the circumstances of the incident. Among the possible causes may be a criminal rivalry,” a security source told RIA Novosti.