It appears that Iranian proxies initiated a missile attack on a facility used by US forces in Iraq.
https://www.cbsnews.com/news/rockets...ing-us-troops/
Baghdad — At least 10 rockets targeted a military base in western Iraq that hosts about 2,000 U.S. troops on Wednesday, American and Iraqi military officials said. A U.S. defense official told CBS News national security correspondent David Martin there were no reported casualties among U.S. or coalition troops, but one American civilian contractor, who had taken cover in a bunker on the base, died of a heart attack during the rocket strike.