DENVER -- A partial power outage at Denver International Airport caused some long lines during a busy holiday travel day.

Officials report a power outage hit the south side of the main terminal at DIA at 8:45 a.m. Officials said power was restored three hours later.

Xcel Energy reported that a bad cable was to blame for the outage. Xcel Energy crews repaired the cable and are investigating a cause currently. Almost 200 customers in the area were also without power.

The three gate terminals at the airport and the control tower were not affected.

What was affected was the security area on the south side of the airport. As a result of the loss of power to the area, the Transportation Security Administration security checks had to be done manually.

Wait times were estimated to be 45 minutes to get through security during the morning. Security personnel had to hand search bags and wand people down.

The airport estimates 155,000 travelers will pass through DIA on Saturday.