Kushner, the president's son-in-law and adviser, spoke with Russian Ambassador to the U.S. Sergey Kislyak in early December of previous year about setting up a "secure communications channel. using Russian diplomatic facilities" in the U.S., according to the report.

TAORMINA, Italy Asked about reports that Donald Trump's son-in-law had tried to set up a secret channel of communication with Russian Federation before the president took office, U.S. National Security Adviser H.R. McMaster said that so-called "back-channeling" was normal.

Former National Security Adviser Michael Flynn also attended the meeting with Kushner, the Post reported, citing U.S. officials.

Sergey Kislyak - went back to Moscow after the meeting, where he reportedly told his superiors that Kushner had suggested using Russian diplomatic facilities for the communications.

Obama administration officials told The Associated Press earlier this week that the frequency of Flynn's discussions with Kislyak raised enough red flags that aides discussed the possibility Trump was trying to establish a one-to-one line of communication - a so-called back channel - with Russian President Vladimir Putin. Keep in mind, the FBI is investigating whether people in the Trump campaign might have been involved in Russia's attempt to interfere in the 2016 election.

Kushner has acknowledged meeting during the transition with the Russian ambassador to Washington, but Reuters, citing seven current and former United States officials, reported Friday that Kushner had several previously undisclosed contacts with Russia's ambassador - including two phone calls between April and November of 2016.

In response to repeated questions from reporters, Trump economic adviser Gary Cohn said, "We're not "We're not going to comment on Jared". This report adds to the growing number of questions he might have to face when he gets back. A White House official has confirmed plans for supporters meetings. News was breaking that US officials thought Russia meddled in the election, and Kushner may have recognized how politically sensitive it would be to meet with the Russians.

The meeting also was attended by Michael Flynn, Trump's first national security adviser.

Reached Friday, an administration official said there would be no comment on the latest Kushner report.

More news: Landslide buries California's scenic highway in Big Sur
More news: President Trump wrapping up his first international trip on Saturday
More news: Outcome of Trump's Middle East trip remains a mystery

Congressional committees want to find out if the Russians stopped Hilary Clinton getting to the White House.

Manafort, Trump's former campaign chairman, has come under the spotlight for his past dealings with the pro-Russian former president of Ukraine.

Kushner's lawyer said he is ready to talk to federal investigators as well as Congress about his contacts and his role in Trump's 2016 campaign.

The contacts included two phone calls between April and November past year, two of the sources told Reuters. Kushner's attorney said her client is willing to talk to the Federal Bureau of Investigation if asked.

The Trump administration has come under sustained pressure over its alleged links to Russian Federation, in an ongoing controversy which has tainted the start of his Presidency.

U.S. intelligence agencies believe Moscow tried to tip November's presidential election in favour of Republican Mr Trump, who went on to beat Democratic rival Hillary Clinton. Responding to that report, Kushner's attorney, Jamie Gorelick, said her client "participated in thousands of calls in this time period".

Current and former American officials said Kushner's activities, like those of many others around Trump, are under scrutiny as part of the investigation.

It is common for senior advisers of a newly elected president to be in contact with foreign leaders and officials.