Russian air defense forces have been put on high alert ahead of two days of planned Ukrainian missile tests, west to the Crimean peninsula which Russia annexed two years ago.

俄罗斯防空部队在乌克兰预计进行导弹实验前的两天就处于高级戒备状态，而在地理位置上，乌克兰位于俄罗斯曾于两年前兼并的克里米亚半岛西部。