"Ukraine's position is still unclear. Ukraine insists that it needs more time to withdraw heavy weaponry,” Vladislav Deinego told RIA Novosti.
Deinego insisted that the Minsk agreements should be followed by both sides.
"We insist that it is necessary to follow to the set of measures that was signed to the smallest details," he said.
Despite the truce agreement, fighting continued in the regions, intensifying greatly in the first weeks of 2015.
In a bid to find a solution to the 10-month conflict in Ukraine’s southeast, the country’s president met with Russian, German and French leaders for talks in Minsk earlier in February.
Kiev later stated that the pullback would begin only after sporadic attacks ceased entirely.
On Wednesday, a spokesman for Ukraine’s armed forces said Kiev had begun the withdrawal of heavy weapons along the entire contact line, while Donetsk militia said that it had withdrawn 90 percent of its heavy weaponry.
