PORTLAND, Ore. (KOIN) — One person is dead after being stabbed on a MAX train Sunday night, according to Portland police.

Authorities are still attempting to track down a suspect.

WATCH: Burglary suspect breaks into Washington County museum

Police say the stabbing occurred at the Goose Hollow Transit station around 6:30 p.m.

“Officers arrived and located an adult male suffering from a stab wound. Officers provided emergency medical aid to the victim prior to paramedics’ arriving. The victim was transported to an area hospital by ambulance where he was later declared deceased,” police said.

Officials believe the victim entered the train following the initial attack.

TriMet tells KOIN 6 that the MAX Blue and Red lines are currently disrupted. However, shuttle buses are serving stations between the Sunset Transit Center and Galleria/SW 10th Avenue. Riders should expect delays.

The Goose Hollow MAX stop will be closed for several hours, police say.

“My heart goes out to the victim’s family and friends,” Portland Police Chief Bob Day said. “For someone to lose their life in a violent crime is unacceptable. For it to happen on Christmas Eve is exponentially worse. I can assure the community our officers and detectives are doing everything in their power on this holiday to track down those responsible.”

“We share condolences with those who are dealing with this loss tonight and loved ones of the person who died,” added Tia York with TriMet.

Anyone with information or tips about a possible suspect is asked to call Portland police.

For the latest news, weather, sports, and streaming video, head to KOIN.com.