Multichannel News is reporting that AT&T's U-verse TV experienced nationwide outages from Sunday morning to 7:30 p.m. CST.

U-verse TV customers spilled over to forums on Sunday to voice their frustration at both the outage and customer service. According to user accounts, the outage affected certain households to varying degrees where some saw only limited channels unavailable and others experienced a complete outage.

Sources at AT&T said the company is still investigating the cause of the outage.