A former Soviet counter-intelligence official attended a meeting last year with senior aides to President Donald Trump and his son, it has emerged.
Rinat Akhmetshin, now a lobbyist, confirmed to US media he was present at the Trump Tower encounter.
Donald Trump Jr was promised damaging material on Hillary Clinton at the meeting, his emails show.
Mr Trump Jr has only previously acknowledged that a Russian lawyer, Natalia Veselnitskaya, was present.
The president’s eldest son has played down meeting, which took place on 9 June 2016, since it was reported this week.
But the Senate Judiciary Committee has asked Mr Trump Jr, 39, to testify publicly
Several congressional panels and federal investigators are looking into claims that Russia meddled in last year’s US election in a bid to help Donald Trump.
The New York meeting was also attended by the president’s son-in-law, Jared Kushner, and election chairman, Paul Manafort.
It has emerged as the firmest evidence …