Ukraine starts arms pull back from frontier

Ukraine's military yesterday said it was starting the withdrawal of heavy weapons from the frontline, bolstering a stuttering peace plan as the United States and Russia traded barbs over the conflict.

The announcement of the pull-back -- a key part of a peace deal negotiated this month -- comes after a shaky truce that was meant to come into force February 15 finally took hold across the conflict zone in recent days.

"Ukraine is today (Thursday) beginning the withdrawal of 100mm cannons from the frontline," the army said in a statement.

"This is the first step in the pull-back of heavy weapons and will be carried out exclusively under the supervision and verification of the OSCE (the Organization for Security and Cooperation in Europe)."

The withdrawal of all weapons over a calibre of 100mm is meant to contribute to a buffer zone between the two warring sides of between 50 and 140 kilometres, depending on the range of the arms.

Rebels insist they have already begun withdrawing artillery, rocket launchers and tanks from some areas.

But there was no confirmation from the OSCE of any pull-back, with its monitors saying the warring sides had not provided the information needed to determine what, if any, arms withdrawals have occurred.

Under the terms of the peace plan signed by both Kiev and the rebels this month, the withdrawal is meant to be completed within 14 days.

Fighting has died down dramatically over the past few days. Ukraine's military said for the second day running that there were no fatalities among its soldiers but that four had been wounded.

While fighting subsided, tensions between the West and Moscow swirled on unabated.

Addressing US lawmakers on Wednesday, Secretary of State John Kerry said Russia and pro-Moscow rebels had failed to meet the terms of the ceasefire.

Russian President Vladimir Putin had put in place policies that "violate all the international norms with respect to territory and behaviour," Kerry said.

But Moscow says threats of new punishment are evidence that the West is not interested in the success of the latest effort to stop fighting that has cost at least 5,800 lives since April.

Russia has itself ratcheted up the pressure by warning it could cut off gas supplies to Ukraine -- and, by extension, to parts of the European Union.

The West says the best hope for a negotiated solution to the 10-month conflict lies with the truce, which last week won unanimous backing from the UN Security Council.