Ukrainian President Poroshenko and U.S. Vice President Biden today:
Here's today's situation map from the Ukrainian military.
A few more details, via our newsroom, on the alleged shelling from Russian territory of Luhansk, as we mentioned earlier:
Ukraine's military says its territory was shelled from Russia for the first time since the signing of a cease-fire on September 5.
Ukrainian military spokesman Andriy Lysenko said on November 21, "Over the past day, for the first time since the signing of the Minsk agreement, the shooting of Ukrainian territory restarted from the side of the Russian Federation."
Lysenko said that artillery shells were fired at a border post in eastern Ukraine's Luhansk region from the direction of the village of Manotsky in Russia's Rostov region.
Lysenko said that Russian army units on Ukrainian territory and formations of separatist fighters were reinforcing their positions and that heavier shelling had been seen in the direction of the key government-held port city of Mariupol.
Moscow denies that it is involved in the fighting although it does give the separatists open political backing.
Based on reporting by AFP and Unian