Karine Jean-Pierre held a news briefing shortly after the white powder that was found in the White House has been identified. The white, powdery substance that prompted a brief evacuation of the White House over the weekend has been confirmed to be cocaine by laboratory testing, The Independent has learned. A spokesperson for the US Secret Service, which by law is responsible for security in and around the 18-acre White House campus, confirmed the laboratory result in an email on Wednesday. The spokesperson, Anthony Gugliemi, previously said the agency was standing up “an investigation into the cause and manner” of how the cocaine came to be in a public waiting area in the West Wing, where it was discovered late Sunday by officers with the Secret Service Uniformed Division. Watch more videos at the Independent TV: https://www.independent.co.uk/tv/editors-picks Click here to subscribe to The Independent: https://bit.ly/Subscribe-to-Independent About The Independent: Making Change Happen. The Independent is the world’s most free-thinking newsbrand, providing global news, commentary and analysis for the independently-minded. Connect with The Independent: Check out our full video catalog: null Videos, daily editorial and more: http://www.theindy.com/ Click here to get the best of The Independent daily: https://www.independent.co.uk/newsletters Like The Independent on Facebook: https://www.fb.com/TheIndependentOnline Follow The Independent on Twitter: https://twitter.com/Independent Follow The Independent on Instagram: https://www.instagram.com/the.independent Download the iOS & Android app: https://www.independent.co.uk/subscribe/app Help to support truly independent journalism. Every dollar you contribute will directly fund additional special reports and investigations from a free-thinking, award-winning newsroom you can trust - https://www.independent.co.uk/donations Subscribe to Independent Premium for exclusive content & live events: https://bit.ly/2MiOONB