U.S. says Sotloff beheading video is authentic _lowres

In this file still image from an undated video released by Islamic State militants on Tuesday, Aug. 19, 2014, purports to show journalist Steven Sotloff being held by the militant group. An Internet video purporting to show the beheading of U.S. journalist Sotloff by the Islamic State group was posted online Tuesday, a beheading described as retribution for continued U.S. airstrikes in Iraq. (AP Photo, File)

WASHINGTON (AP) — The White House says it has determined that a video showing the brutal killing of freelance journalist Steven Sotloff is authentic.

Islamic State extremists released the video showing Sotloff’s beheading on Tuesday. It comes two weeks after the militants released a video showing the killing of James Foley, another American journalist.

In the Sotloff video, a masked militant warns President Barack Obama that continuing airstrikes against the group in Iraq will be met with the killing of more Western captives.

Sotloff is a 31-year-old Miami-area native who freelanced for Time and Foreign Policy magazines. He vanished in Syria in August 2013.

National Security Council spokeswoman Caitlin Hayden announced the U.S. intelligence community’s assessment of the video in a statement Wednesday.