By: KDKA-TV News Staff

PITTSBURGH (KDKA) – A power outage just after 4:30 a.m. at Pittsburgh International Airport is causing “residual delays” at security checkpoints.

READ MORE: Pittsburgh Weather: Cool Conditions After Cold Front Brings Severe Storms

According to a statement provided to KDKA from Pittsburgh International Airport, the outage occurred as crews were conducting electrical testing overnight.

READ MORE: Judge Denies Robert Bowers' Motion For Govt. To Produce Evidence It Monitored His Online Activities

The power outage lasted roughly 12 minutes and caused security lines to close.

MORE NEWS: Pa. Native, Penn State Grad Carl Nassib Comes Out As First Openly Gay Active NFL Player

Those lines have since reopened but the airport is cautioning travelers to leave extra time before arriving for their flights.