The Pentagon’s latest assessment is that Russia is gearing up for, but has not yet begun, an intensified offensive in the Donbas. A senior US defence official said the Russians are moving more troops and material toward that area and are focusing many of their missile strikes there.
The war is now in its seventh week, with Russian forces now concentrating their offensive on eastern Ukraine, after retreating from the capital Kyiv.
Follow Monday's events as they unfold in our blog below, or watch television coverage in the video player, above.