Ukraine crisis: OSCE monitors 'to be sent to truce violation areas'
The leaders of Ukraine, Russia, France and Germany have agreed to send OSCE observers to areas of Ukraine where violations of a truce have been reported, Kiev says.
In a statement, Ukrainian President Petro Poroshenko says the leaders - who spoke by phone - backed Kiev's proposal to begin with 10 locations in the east.
A statement on the Russian presidential website did not mention the proposal.
Separately, the EU brokered a deal which secures Russian gas for Ukraine.
Russia had threatened to cut off gas supplies unless it received outstanding pre-payments from Ukraine.
Now Ukraine's gas company Naftogaz has agreed to pre-pay for gas to cover Ukrainian needs until the end of March. Russia's Gazprom plans to deliver up to 114m cubic metres (4,026m cu ft) daily.
However, there was no agreement on gas deliveries to rebel-held areas in eastern Ukraine. Ukraine has protested over direct Russian gas deliveries to the pro-Russian separatists controlling the Donetsk and Luhansk regions.
Ukraine is a vital transit country for Russian gas exports to the EU. About 40% of EU gas imports come from Russia.
EU Commission Vice-President Maros Sefcovic said Monday night's agreement meant "the supply of gas to the EU markets remains secure".
Both Ukraine and the pro-Russian rebels say they are withdrawing heavy weapons from the combat zone.
A fragile ceasefire agreed in Minsk, Belarus, is said to be broadly holding, despite some fighting in recent days.
At least 6,000 people are believed to have been killed since the conflict in Ukraine's eastern Donetsk and Luhansk regions erupted last April, a month after Russia annexed Ukraine's southern Crimea peninsula.
The Ukrainian government, Western leaders and Nato say there is clear evidence that Russia is helping the rebels with heavy weapons and soldiers - something Moscow denies.
'Piecemeal' approach
President Poroshenko held talks late on Monday with his Russian and French counterparts Vladimir Putin and Francois Hollande, as well as German Chancellor Angela Merkel.
Mr Poroshenko's statement said afterwards that "the parties have endorsed the Ukrainian proposal to send the OSCE (Organization for Security and Co-operation in Europe) observers to all locations of the ceasefire regime violation".
It said the process would start in 10 places: "Shchastya, Popasna, Stanytsia Luhanska, Krymske, Avdiivka, Volnovakha, Hranitne, Luhanske, Shyrokino and the area of Donetsk airport".
Without mentioning this agreement, the Russian statement stressed on "the importance of implementing the ceasefire and the continuation of the withdrawal of heavy weaponry under the OSCE monitoring".
Meanwhile, German government spokesman Steffen Seibert said the four leaders agreed that the OSCE should play a greater role and requested that the organisation publish daily reports on the situation on the ground.
The OSCE monitoring mission has previously reported weapons movements on both sides - but says it is too early to confirm a full withdrawal.
Earlier on Monday, US Secretary of State John Kerry accused the rebels of a "piecemeal" approach to the ceasefire deal.
He also said he had warned Russia that it faced further sanctions if the conditions of the truce were not met in full.
Are you in Ukraine? Have you been affected by the unrest in the in the country? You can email your experiences to haveyoursay@bbc.co.uk.
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