Source Unknowing News Today

Audie? >> the context for this of course, is the counteroffensive that ukraine has been running the last couple weeks. so are we looking at retaliation or a possibility this is part of that effort? >> reporter: its hard to say. the ukrainians have been involved without a source unknowing whether they were behind todays incident in moscow. but they have done a variety of things. they are aimed to sort of undermine public confidence in the ability of moscow to actually run the country. so, for ins...