Russian president Vladimir Putin:  “We talk about ‘the Ukrainian army, the Ukrainian army’, but who is really fighting there?” Photograph: Mikhail Klimentyev/Ria Novosti /Kremlin Pool/EPA

Kremlin tells West to drop threat of more sanctions and increase pressure on Kiev

A bus passes by a memorial to those killed when a rocket struck a bus stop in Donetsk. Photograph: Brendan Hoffman/The New York Times

Rocket strikes by rebels backed by Moscow claim 30 civilian lives

Pro-Russian rebels unload the body of a slain colleague at a hospital in Donetsk, Ukraine yesterday. Photograhp: Brendan Hoffman/The New York Times

Putin says Ukraine’s ‘criminal’ push in the east prompted latest surge in bloodshed

A kindergarten which was shelled in Debaltseve, Donetsk area in Ukraine. Diplomats from Russia, Ukraine, France and Germany met this week to thrash out a tentative dividing line from which the warring sides would pull back their heavy weapons. Photograph: Anastasia Vlasova/EPA

Separatists in east Ukraine warn they intend to continue advances and take more territory

Captive Ukrainian soldiers kneel as the leader of the self-declared Donetsk People’s Republic Alexander Zakharchenko (left) stands   at a bus stop where 13 people were killed when a  bus was shelled.   Photograph: Aleksander Gayuk/AFP/Getty Images

Killing continues despite foreign ministers’ claims to have made some progress in talks

 Russian foreign minister Sergey Lavrov (left)  with German foreign minister Frank-Walter Steinmeier upon Mr Lavrov’s arrival to meet  Ukrainian foreign minister Pavlo Klimkin and French foreign minister Laurent Fabius to discuss the ongoing conflict in eastern Ukraine at Villa Borsig, Berlin, Germany,  on January 21st, 2015. Photograph Sean Gallup/Getty Images

Moscow rejects allegations ahead of key foreign ministers’ meeting

Ukraine’s president, Petro Poroshenko, looks on during the Crystal Award ceremony ahead of the opening of the 45th annual meeting of the World Economic Forum in Davos, Switzerland, on Tuesday.  Photograph: Jean-Christophe Bott/EPA

Kiev says Russian forces are fighting alongside rebels and troops by Ukraine border

A man rides a Ukrainian tanks past a damaged vehicle in the village of Tonenke, 5km from  Donetsk airport.  Photograph: Oleksandr Stashevskiy/AFP/Getty Images

Fighting continues as Kiev claims fresh Russian forces have crossed the border

Female Ukrainian army cadets hold placards reading “I am Volnovakha” in French and Ukrainian during a march on Independence Square in Kiev yesterday to pay tribute to the 13 passengers of a bus killed after a shelling by pro-Russian separatists in small eastern Ukrainian ciry of Volnovakha. Photograph: Sergei Supinsky/AFP/Getty Images

Fears grow over further escalation as separatists appeal for international help

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