Russian naval targets and port infrastructure have been hit in an attack on its Black Sea fleet in Crimea, Ukraine has said. "In a post on Telegram, the head of Ukraine's air force Mykola Oleshchuk thanked his pilots for their "excellent combat work" - strongly suggesting weaponry had been launched by Ukrainian aircraft. Ukraine claims to retake Black Sea drilling rigsRussian missile targeted civilian cargo ship - UKUkraine offensive could have only 30 days left - US Army chiefHow worrying is a Putin-Kim Jong Un alliance?Helicopter heat signal found escaped killer, US police sayWatch police pose for photo after dramatic arrest