Rescue workers search for survivors after Ukraine apartment tower bombed

An urgent search for survivors is happening at the scene of a bombed out apartment tower in the Ukrainian city of Uman.

The building was hit by a Russian missile early Friday morning, while people were sleeping. So far at least 20 people are confirmed killed, but that toll is expected to climb.

It's believed to be the worst single attack on Ukrainian civilians since a high-rise apartment in Dnipro was hit back in January. CNN’s Nic Robertson reports from the scene.