A Facebook Live video capturing the aftermath of a fatal police shooting briefly disappeared from Facebook after going viral on Wednesday night, and the social networking site has apologized, blaming the down time on a bug in the system.

"We're very sorry that the video was temporarily inaccessible," a Facebook spokesperson told TechCrunch. "It was down due to a technical glitch and restored as soon as we were able to investigate."

The video is now available again on Facebook, though it carries a warning reading, "Graphic video: Videos that contain graphic content can shock, offend and upset. Are you sure you want to see this?"