MOSCOW (Reuters) - The Russian Navy on Thursday fired seven cruise missiles at Islamic state targets in the suburbs of Syria s Deir al-Zor, the Russian Defence Ministry said in a statement on Thursday. It said the missiles were fired from two submarines in the eastern Mediterranean from a distance of 500-670 kilometers (727 miles).   The targets were command posts, communication centers, as well as militants  weapons and ammunition stockpiles in areas of south-east Deir al-Zor under the control of Islamic State,  the ministry said. 