HOUSTON – Verizon customers in the Houston area reported problems with their service Tuesday.

DownDetector.com, a crowd-sourced website, showed bull's-eyes of trouble spots over not only Houston, but also Austin and Dallas. It appeared problems were also being reported in the Oklahoma City area.

A check of the Verizon Support Twitter account showed the outage was also being experienced in other cities across the country. Most of them seemed to be concentrated in the eastern U.S.

It was not immediately clear what caused the outage or when service would be restored.

Verizon sent KPRC2 a statement that read:

"Verizon Wireless is currently experiencing an intermittent voice, text and data services interruption for customers in some markets in the south. Our engineers are aware of the issue and are working diligently to resolve it."