In some cases, the monitors were not allowed to visit places of new weaponry dislocation, Bociurkiw told Russian daily Kommersant.
The SMM urges the sides of the Ukrainian conflict to provide monitors with the information on numbers and dislocation of heavy artillery in the conflict zone. The mission also needs data on weaponry withdrawal routes and dislocation areas, Bociurkiw said.
Under the agreement reached in Minsk, Kiev and independence supporters must withdraw their heavy artillery to a distance of 30-85 miles from the line separating the government forces and the eastern Ukrainian militia.
On Sunday, the self-proclaimed republics of Donetsk and Luhansk (DPR and LPR) officials said they completed the withdrawal of heavy weaponry from the contact line.
On the same day, Ukrainian military spokesman Anatoliy Stelmakh said that Kiev forces would complete the first stage of its heavy weaponry withdrawal on Sunday. Stelmakh, however, was unable to confirm what portion of Kiev's heavy weapons had already been withdrawn.