It’s being described as the most serious intelligence leak in years. Dozens of pages of classified material are spreading online, after being originally posted on a gaming platform. U.S. officials are investigating the origin of the leaks and the impact of information meant to be secret about the war in Ukraine, Russian forces and even U.S. spying on American allies. Nick Schifrin reports.

Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG
Find more from PBS NewsHour at https://www.pbs.org/newshour
Subscribe to our YouTube channel: https://bit.ly/2HfsCD6

Follow us:
TikTok: https://www.tiktok.com/@pbsnews
Twitter: http://www.twitter.com/newshour
Instagram: http://www.instagram.com/newshour
Facebook: http://www.pbs.org/newshour

Subscribe:
PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts
Newsletters: https://www.pbs.org/newshour/subscribe