Updated: November 14, 2019 10:59 AM

A second U.S. embassy staffer in Kyiv overheard a key cellphone call between President Donald Trump and his ambassador to the European Union discussing the need for Ukrainian officials to pursue “investigations,” The Associated Press has learned.

The July 26 call between Trump and Gordon Sondland was first described during testimony Wednesday by William Taylor, the acting U.S. ambassador to Ukraine. Taylor said one of his staffers overhead the call while Sondland was in a restaurant the day after Trump’s call with Ukrainian President Volodymyr Zelenskiy that triggered the House impeachment inquiry.