A man and a woman were stabbed on a light-rail train Thursday evening in downtown Denver.

The pair are being treated for serious injuries, police said.

ALERT: #DPD is investigating a stabbing at 18th & California, on the light rail train. Two people, one male, one female, are being treated for serious injuries, but they appear to be non-life threatening. One female suspect is in custody. Remains active investigation. #Denver pic.twitter.com/03gAtUBmaW — Denver Police Dept. (@DenverPolice) July 20, 2018

A woman was taken into custody as a suspect. The incident happened at 18th and California streets. An investigation is ongoing.