 An explosion has occurred on a Russian army ship transporting caliber cruise missiles in the Crimean city of Sevastopol, Ukrainian telegram channels reported. According to the report, the incident took place on board of the 21,631-by-an-m small missile carrier. The sound of the explosion was heard in different parts of the city and alarm systems have been activated in cars. Governor of Sevastopol Mikhail Razvozeev said the smoke had been caused by military exercises held on the ship. According to some sources, there are casualties as a result of the incident. The victims have been removed from the area by helicopters. The footage spread on telegram channels shows ambulances moving in the area after helicopters.