WASHINGTON (AP) — A Russian lawyer who discussed sanctions with Donald Trump Jr. at a Trump Tower meeting during the 2016 campaign recently met U.S. Senate investigators in Berlin, a person familiar with the interview tells The Associated Press.

Investigators looking into Russian interference in the campaign interviewed Natalia Veselnitskaya (veh-sehl-NIHT'-sky-ah) at a Berlin hotel, according to the person, who spoke on condition of anonymity because the details of the interview are confidential.

The interview lasted about three hours and was focused on information contained in a dossier compiled by a former British spy. The work was funded by the Democratic National Committee and the campaign of Hillary Clinton. The dossier contains numerous allegations of Russian ties to Donald Trump, his associates and the Trump campaign.