"The Capitol Police are sending warnings to employees that they are blocking roads" due to a bomb threat at the Labor Department, "Solender wrote on Twitter.

Capitol Police sends alert to staff announcing road closures "due to a bomb threat at the Department of Labor": pic.twitter.com/PoNHpA2ftd

- Andrew Solender (@AndrewSolender) October 19, 2021

On September 13, four people were injured in an explosion at a residential complex in De Kalb County in the US state of Georgia.