The Senate’s Hart and Dirksen buildings were evacuated at 11:07 a.m. Tuesday after a decrease in the water pressure triggered a fire alarm in Dirksen.

The fire marshal subsequently reset the alarm and cleared the buildings for re-entry at about 11:55 a.m., said Kim Bolinger, a Capitol Police spokeswoman.

At 12:25 p.m., an audible alarm sounded in Hart, leading to another evacuation of both buildings. The buildings were again cleared for re-entry around 1 p.m. According to a statement by the Architect of the Capitol and the Capitol Police, the problem is associated with fluctuating water pressure in both buildings and is being remedied.

Additionally, fire alarm strobe lights on the fourth floor of the Capitol were triggered. The AOC is in the process of fixing the electrical malfunction.

— Bree Hocking