The Democratic chairmen of two House committees pledged Friday to investigate a report that President Donald Trump directed his personal attorney to lie to Congress about negotiations over a real estate project in Moscow during the 2016 election.

House Intelligence Committee Chairman Adam Schiff, D-Calif., said “we will do what’s necessary to find out if it’s true.” He said the allegation that Trump directed Michael Cohen to lie in his 2017 testimony to Congress “in an effort to curtail the investigation and cover up his business dealings with Russia is among the most serious to date.”

The chairman of the House Judiciary Committee, Rep. Jerrold Nadler of New York, said directing a subordinate to lie to Congress is a federal crime.

The report by BuzzFeed News, citing two unnamed law enforcement officials, says that Trump directed Cohen to lie to Congress and that Cohen regularly briefed Trump and his family on the Moscow project — even as Trump said he had no business dealings with Russia.