USA (NewsFirst) — A cellular outage in the United States was reported by AT&T, T-Mobile, Verizon and other network users on Thursday. This outage has affected the ability for some users to dial 911. If you attempt to call 911 and can’t get through, immediately call the main lines at your police, sheriff’s, and fire departments.

Customers of numerous U.S. cell service providers were reporting outages early Thursday morning, according to the website, which tracks such reports.

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

Some municipalities were reporting issues with 911 service.

The reports of 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.