Russia plans to send another humanitarian convoy into eastern Ukraine “in the next few days”, Foreign Minister Sergei Lavrov has said.
Mr Lavrov said the humanitarian situation there was “deteriorating”.
Ukraine did not authorise the first convoy, which returned to Russia at the weekend, fearing it carried military equipment for pro-Russia separatists.
More than 2,000 people have died in recent months in fighting between government forces and the separatists.
Some 330,00 people have been displaced.
The Russian and Ukrainian presidents are scheduled to meet in Minsk, Belarus, on Tuesday for talks on the crisis.
Mr Lavrov said he had sent a note to the Ukrainian foreign ministry on Sunday informing it of the new convoy.
He told a news conference on Monday: “The humanitarian situation is not improving but deteriorating.
“We want to reach an agreement on all conditions for delivering a second convoy by the same route… in the coming days.”
There were reports on Monday of a column of Russian armoured vehicles entering the Donetsk region of Ukraine.
Ukrainian media spoke of heavy clashes with Ukrainian forces.
When asked about a possible Russian incursion, Mr Lavrov said that “there is enough disinformation”.