GOODWELL, Okla.—A collision between two freight trains that claimed the lives of three people may have been caused by missed signals.
Two Union Pacific freight trains hit head-on back in June near the town of Goodwell.
The crash also caused a massive fire on the tracks.
The National Transportation Safety Board announced Tuesday that the eastbound train was going almost 70 miles per hour just before the accident.
It had passed a signal that was warning it to slow down or stop but may have not heeded the warning.