ILOVAYSK, Ukraine — Russian-backed separatists moved some heavy weapons well back from the front line Tuesday in eastern Ukraine, but the Ukrainian government disputed the rebels’ claim that a real pullback had begun.
A peace plan worked out in marathon talks on Feb. 12 aims to create a wide buffer zone between the two sides’ artillery, part of efforts to end the conflict that has left nearly 5,800 dead since April. Heavy weapons are to be pulled back 15 to 45 miles from the front line, depending on their caliber.
The disagreement over a weapons pullback came as the fragile peace deal for Ukraine was discussed in Paris by the foreign ministers of Russia, Ukraine, Germany, and France. The talks ended without apparent progress, although the participants pledged adherence to the peace deal.
Ukraine’s foreign minister, Pavlo Klimkin, told reporters that rebel shelling of Ukrainian positions had to stop before Ukraine started withdrawing its artillery. ‘‘You can’t pull out . . . while shelling is coming down on you,’’ he said.
Russia denies Ukrainian and Western allegations that it is supplying rebels with troops and equipment, but Western officials and NATO insist satellite photos show Russian military equipment in eastern Ukraine.
Eduard Basurin, a top rebel commander in the Donetsk region, said his side had begun a large-scale pullback of heavy weapons in line with the peace plan, but that could not be verified. A rebel website quoted him as saying 100 122-mm howitzers would be involved.
Associated Press reporters saw about a dozen howitzers moved from Donetsk, the largest rebel-held city, to the town of Ilovaysk 12 miles to the east. That would put them roughly within the 15-mile pullback criterion for weapons of that size.
Michael Bociurkiw, a spokesman for the international team monitoring the fighting, said he couldn’t confirm any pullback until receiving monitors’ reports.
The Ukrainian military dismissed the rebel pullback claim and said its forces would not withdraw their weapons until a cease-fire holds. Ukraine’s military spokesman, Colonel Andriy Lysenko, said no Ukrainian withdrawal was underway.
Rebels ‘‘are just regrouping their gangs and are relocating their weapons,’’ he told reporters. ‘‘As soon as there is a cease-fire for two days, that is the signal to start a withdrawal.’’