Updated 1:04 p.m. | Shortly after 1 p.m. Thursday a loud bell rang followed by a loudspeaker announcement reopening the Cannon House Office building after an evacuation order that lasted more than an hour.

Cannon was evacuated Thursday morning when alarms sounded.

Capitol Police and the Architect of the Capitol investigated the issue determined that a malfunctioning electrical panel was the cause. There were no reports of smoke or fire, according to a Capitol Police statement.

The House is in recess and most lawmakers are back in their districts ahead of the midterm elections.

Staff were required to show their congressional ID to re-enter the building. IDs are not typically required to enter, which left dozens of staffers outside calling colleagues to deliver their IDs to them from inside.