A Capitol Police officer stands guard in front of the US Capitol Building, on June 14, 2017 (AFP)
The Capitol Police announced that they were investigating reports of a "suspicious substance" found in the Hart office building on Capitol Hill Tuesday.
Fox reporter Chad Pergram wrote that the substance was reportedly found near the office of Alaska Republican, Sen. Dan Sullivan.
"Staff and other personnel are directed to avoid this area until further notice," Pergram posted on X.
A Hazmat team was called.
Neither the Capitol Police nor Sullivan's office has commented on social media about the matter.
The all-clear was given shortly after noon EST, Pergram said on X.
See footage from inside the building below:
