The Kremlin has denied reports of a conversation between Putin and Trump last week

The Kremlin on Monday denied reports that President Vladimir Putin spoke to President-elect Donald Trump last week the war in Ukraineand a spokesman for Trump declined to comment on his so-called “private conversations” with world leaders.

The Washington Post first reported on Sunday, citing anonymous sources, that the two spoke on Thursday, with Trump advising Putin not to escalate the war in Ukraine and citing the significant U.S. military presence in Europe.

In a conference call with journalists on Monday, Kremlin spokesman Dmitry Peskov said “no conversation took place” and that the report was “completely untrue, it is pure fiction.”

Asked about the report, Trump’s communications director Steven Cheung said: “We do not comment on private conversations between President Trump and other world leaders.”

Putin spoke at a foreign policy forum in the Russian Black Sea resort of Sochi on Thursday congratulated to Trump on his Election victory and praised him for what he said was “courageous” behavior during an assassination attempt on his life in July.

Peskov said there were “no concrete plans yet” for a conversation between Putin and Trump. He previously said that contact between the two before Trump’s inauguration was “not ruled out,” pointing to Trump saying he would call Putin before the inauguration. However, he denied that the Russian presidential administration or the State Department had any contact with Trump’s campaign team after the election.

During his campaign, Trump repeatedly said he could quickly end the fighting in Ukraine but gave no details on how he would achieve that.

Russia has increased its attacks civil areas in Ukraine as the war approaches its 1,000-day mark. Ukraine, for its part, sent a massive wave of drones over the weekend that shook Moscow and its suburbs.