Updated

A power outage caused a more than 20-minute delay in Thursday night's game between No. 13 North Carolina and Wake Forest in the second round of the Atlantic Coast Conference tournament.

The lights in the Greensboro Coliseum went out briefly at the 16:19 mark of the second half, though the scoreboard, shot clock and electronic display on the scorer's table immediately came back on. However, much of the main lighting system didn't immediately turn on again.

Officials said they expected a delay of about 15 minutes to get everything back on line. The game resumed after 23 minutes, though the main scoreboard hanging over midcourt wasn't working by the time of the restart.

It wasn't immediately clear what caused the outage.

The Tar Heels won the game 69-65.