Russian Foreign Minister Sergei Lavrov said that OSCE monitors would see Russia is not sending arms and fighters to help the rebels.
"We expect the OSCE observers to deploy at the Donetsk and Gukovo checkpoints in the next few days," Lavrov said at a briefing in Moscow.
He said that the OSCE could use drones and any other technical means to carry out "objective" observation.
"We were asked whether observers could use drones. They're welcome, as part of the mandate the mission has, they can use any technical means of observation and objective control," Lavrov said.
"I hope this will allow us to dispel the suspicions periodically voiced to us that those checkpoints controlled on the Ukrainian side by rebels are used to send weapons and armed people on a mass scale from Russia to Ukraine," Lavrov said.
He said he had asked US Secretary of State John Kerry to "tell his staff members in the OSCE not to hinder carrying out this agreement."
The Russian diplomat accused the West of deliberately stalling the observers' mission after President Vladimir Putin issued the invitation on July 11.
"Two weeks passed, basically in discussions with the OSCE that weren't needed by anyone, when US and British diplomats together with Ukrainian ones tried to stop them accepting this invitation from Russia."
"We presented various programmes for observers to be present at border points, and the fact that this very simple thing was decided after so long can only be explained by one thing: that the West tried to stall this process, I don't know why," Lavrov said.
