Who participated in the high-level diplomatic meeting in Riyadh and how long did it last?

A high-level U.S. delegation led by Secretary of State Marco Rubio met with Russian Foreign Minister Sergey Lavrov in Riyadh. The American delegation also included National Security Adviser Michael Waltz and Middle East envoy Steve Witkoff, marking what appears to be the first significant U.S.-Russia diplomatic engagement since the Ukraine war began. The meeting lasted four and a half hours, suggesting substantial discussions took place between the representatives of both nations. This extended duration indicates the complexity and importance of the topics addressed, likely centering on the ongoing Ukraine conflict and its global implications.