The Federal Communications Commission is investigating what caused an outage Wednesday night preventing mobile AT&T users from calling 911.
The outage lasted around five hours, with AT&T indicating at 10:30 PM that it has fixed the problem.
It's not clear what cause the outage or when it will be repaired. Others at least could call local numbers for emergency services, though that may not be as effective as 911 in an emergency. No small deal, AT&T is the second largest wireless company in the United States behind only Verizon.
Tyler Police Department PIO Don Martin confirmed that customers in the Tyler area may be affected.
AT&T tweeted that it was aware of the problem for wireless customers, and was working to resolve it around 9:45 p.m.
The Travis County Sheriff's Office said that if 311 does not work, call their alternate number at 512-482-5860. An FCC spokesman said the agency was trying to determine how many people were affected but noted the investigation had just begun.