The CBS Sports' website and mobile app for the NCAA Tournament reportedly crashed Thursday morning, less than an hour before the first round of March Madness tipped off.
Users took to Twitter to report the site and mobile app wouldn't let them log in or access their brackets. Several people were frustrated that they couldn't log on to make last-minute adjustments to their picks.
It's unclear what caused the site to crash or when CBS Sports will get the site back up and running.
The NCAA Tournament's First Round is scheduled to tip off at 12:15 p.m. Thursday. The games are aired exclusively on CBS, TNT, TBS and TruTV as well as at NCAA.com for online streaming.