COLORADO SPRINGS, Colo. -

President Obama is sending 350 additional troops to Baghdad.

The State Department asked for those troops to help protect U.S. diplomatic facilities and personnel.

Those troops will not serve in a combat role.

The announcement comes as investigators are analyzing video of another American execution.

Journalist Stephen Sotloft appears to have been killed by ISIS.

The video was released Tuesday morning, showing what appears to be the murder of Sotloft.

“So just as your missiles continue to strike our people, our knife will continue to strike the necks of your people,” said the executioner in the video.

But the voice is similar to the executioner in another video, which showed James Foley’s murder.

Intelligence analysts said it may not be the same voice, but it’s the same accent from the London area.

That detail could link the executions to dozens of radicals who traveled to London to join the fight against the Syrian government.

“I ask you, please release my child,” said Shirley Sotloff, Steven’s mother last week in a video she released.

Sotloff was freelancing for several publications, including Time and the Christian Science Monitor, when he disappeared while reporting from Syria last summer.

“He was very, very courageous,” said Ben Taub, freelance journalist. “It wasn’t a reckless thing.”

The Sotloff video ended just as the Foley video did – with the display of another captive and another implied threat against another prisoner.

ISIS identified it’s next victim as David Haines, a British citizen.

U.S. officials are working to confirm the authenticity of this video.