The Oregon man who fatally stabbed two people on a train is a known white supremacist, authorities said.

Jeremy Joseph Christian, 35, was allegedly slinging racial slurs on a Portland light rail train Friday at two women who appeared to be Muslim. One of the women wore a hijab.

Then two good Samaritans tried to calm the encounter, police said.

Christian knifed both men, authorities said. A third man was also stabbed in the attack.

One of the stabbed men died at the scene, while another died at the hospital. The third victim is expected to survive.

In April, Christian showed up at a “March for Free Speech” in Portland with a baseball bat to attack protesters, and repeatedly gave Nazi salutes, the Portland Mercury reported.

Christian is being held in the Multnomah County Jail on charges of murder and attempted murder.