Numerous U.S. cell service providers having outages, tracking website says

Numerous U.S. cell service providers were experiencing outages Thursday morning, according to the tracking website downdetector.com.

AT&T, T Mobile, Verizon, UScellular and Consumer Cellular were among them.

Some municipalities were reporting issues with 911 service.

The outages appear to have started at around the same time, shortly after 3 a.m. EST, downdetector said, and appeared to be waning some three hours later.

There was no word on the sources of the problems.

CBS News has reached out to all the major carriers for comment.

This is a developing story. Please check back for updates.