By WCCO-TV Staff

MINNEAPOLIS (WCCO) — Emergency phone lines across the United States are back online after an apparent nationwide outage Monday evening.

WCCO first became aware of the outage at about 6:45 p.m. after being alerted by Minneapolis police. By about 7:15 p.m., service was reported being back online by several Minnesota law enforcement agencies.

READ MORE: Tax Refund Delays Likely To Grow As Filing Deadline Nears

At about 8:30 p.m., Minneapolis police announced that service had been restored across the country.

Law enforcement agencies were urging citizens to stop calling 911 lines to test functionality, as those calls were impeding actual emergencies.

The cause of the outage has not been directly identified.

MORE NEWS: OMNI Brewing In Maple Grove Offers Free Beer For Showing Vaccine Card

Click here to find your local emergency dispatch number.