British authorities threw a wrench in the mix of U.S.-led allied nuclear talks with Iran with a new report to the United Nations accusing Tehran of links to two blacklisted companies.
The U.N. Panel of Experts, one group that monitors Iran's compliance with global sanctions, then put out the statement in its annual report.
It read, Reuters reported: "The U.K. government informed the Panel on 20 April 2015 that it 'is aware of an active Iranian nuclear procurement network which has been associated with Iran's Centrifuge Technology Company (TESA) and Kalay Electric Company (KEC)."
KEC is sanctioned by the U.N. Security Council while TESA is sanctioned by American and European Union authorities.
The report comes at a time when America is leading the charge to come to terms with Iran over that country's nuclear development program, insisting at key breakdown points during discussions the country can be trusted if the right deal is struck.
Members of Congress, even in the Democratic Party, have continued to express skepticism, however, and pressed the White House to obtain their approval over any final deal.