911 outages reported in 4 states as emergency call services go down temporarily

Several states lost access to emergency dispatchers late last night, meaning residents were unable to call 911.

The problem affected parts of Nebraska, Texas and Nevada, as well as all of South Dakota. The outage was first reported around 10 p.m. local time. Service was restored around midnight, authorities said.

In Texas, the Del Rio city police department said the outage was caused by “an outage at a major cell phone carrier.” The ministry did not specify which mobile operator was responsible.

Affected areas recommended residents call non-emergency numbers during the outage.

In Las Vegas, Nevada, officials said 911 calls from landlines were not working, but dispatchers could still see incoming calls. Dispatchers worked to call back dialed numbers, officials said on social media. According to officials in Henderson County, Nevada, text messages to the 911 number were coming through even when the phone line was not working.

Officials told CBS News that all call attempts made during the outage were answered.

An investigation into the outage is underway.