Updated: 7:20 p.m. EST

By Justin Franz 

Norfolk Southern is trying to get trains up and running again after an hours-long service disruption resulting from a Positive Train Control outage. 

The outage resulted in NS and Amtrak trains being unable to move because they could not connect to the PTC network. A spokesperson for NS told Railfan & Railroad that the issues were being resolved late Monday afternoon. 

“Earlier today, Norfolk Southern experienced a technology hardware outage that impacted some operations. At this time, we have no indication that this was a cybersecurity incident. We are resolving the outage and trains that are on our lines resumed movement this afternoon,” wrote spokesperson Conner Spielmaker in a brief statement to R&R. 

However, it appeared the issues were continuing late into the evening. For example, Amtrak announced it would be canceling Northeast Regional 66 due to “ongoing host railroad server issues.” Other trains were still set to run but with significant delays.

This isn’t the first time a PTC outage has had a major impact on railroad operations this year. In March, Amtrak was forced to cancel trains for multiple days in a row because of an outage.