grout opposition protesters marching peacefully to the parliament. they came up against a very large security presence. that proximity was enough to trigger the clashes that followed. we don't know who started it precisely, but the government blames the opposition groups, calling them extremists, even terrorists. the opposition believes that it was the government's use of excessive force that resulted in that terrible death toll. but ultimately what it means is that the divisions between these two sides have never been so great, wolf. >> yeah, it's a serious situation. the ukraine security forces, as you point out, now calling these protesters terrorists, and say they're engaged in an anti terror operation. what do we know about this? >> reporter: yeah, it's ominous. we don't know too many details or precisely what it means. but it implies, at least, the imminent use of further force by ukrainian authorities. they are talking about