AT&T customers experiencing nationwide outage impacting cellphones, emergency services

CHICAGO (CBS) – AT&T customers are waking up to a nationwide network outage Thursday morning.

The outage happened during the early morning hours and is impacting cell phones and emergency services.

Customers will receive an SOS message on their cell devices.

There is no word about what led to the outage or when service is expected to resume.

This is a developing story.