The Kremlin has denied reports that a longtime key aide to President Vladimir Putin is stepping down.

The resignation of Vladislav Surkov was reported by Aleksei Chesnakov, an adviser to Surkov and director of Moscow's Center for Political Studies, RFE/RL reported.

Read alsoPutin's aide Surkov leaves civil service over Ukraine – expert

In a Twitter post on January 25, Chesnakov said Surkov was resigning due to what he called a "change of course on Ukraine."

However, Kremlin spokesman Dmitry Peskov said there is no decree yet on Surkov's resignation. He also told Russian media that there had been no change in Kremlin policy on Ukraine.

"As for the alleged change in the policy on the situation in Ukraine, this has nothing to do with reality and reflects only a personal viewpoint of the person who speaks about that," Peskov told the TASS news agency.