DENVER — RTD said that multiple light rail lines are experiencing significant delays Friday morning due to a "communications failure." Around 6 a.m.

, the Regional Transportation District (RTD) said service was suspended for the D line between Interstate 25/Broadway and Union Station. Bus shuttles were operating between I-25/Broadway and Littleton/Mineral, and riders were advised to transfer to the E or H lines for service to Union Station. However, a few minutes later RTD also said the E, H, R and W lines are all impacted , with limited service available and real-time tracking unavailable.

D Line suspended between I-25/Broadway and Union Station due to a communications failure. Bus shuttles in place between Littleton/Mineral and I-25/Broadway. Transfer to H or E lines for service to Union Station.

Expect significant delays on on light rail lines. — RTD (@RideRTD) July 19, 2024 Limited service on E, H, R and W Lines. https://t.

co/soclszCoZx — RTD (@RideRTD) July 19, 2024 A widespread outage involving CrowdStrike that is impacting access to Microsoft 365 apps and services disrupted flights and businesses around the world. 9NEWS has asked RTD whether the issues are related to the worldwide computer outage. RTD did not immediately respond.

Hundreds of flights were canceled or delayed at Denver International Airport Friday morning due to the outage, and operations at Colorado Division of Motor Vehicle locations were also impacted..