Part of US Capitol after industrial incident
A hazardous material response team was on site following an incident that began sometime around 2:30 am to 3 am local time, Capitol Police said.
The House Door and South Door were temporarily closed, but the south barricade was open, Capitol Police said. Tours of the Capitol building were temporarily suspended, but tours of the visitor centre were not affected.
The Architect of the Capitol released a statement indicating the incident involves possible asbestos exposure.
"During ongoing asbestos abatement work there was a potential release affecting the House side of the Capitol," the statement read.