A white supremacist was arrested for stabbing an interracial couple outside a Washington bar in what police believe was a hate crime.

Daniel Rowe, 32, admitted to attacking a 47-year-old black man and his white girlfriend while they were outside a dive bar in Olympia on Tuesday night, a police spokesperson said.

Rowe, who has 'skinhead' and 'white power' tattooed on his body, told police he would go to a Donald Trump rally and 'stomp out more of the Black Lives Matter group', if they would let him go, court documents state.

Daniel Rowe, 32, (left, appearing in court via a closed circuit TV, and right, a police handout) admitted to attacking an interracial couple

The hate crime occurred on Tuesday evening, when a black man was standing outside China Clipper Bar (pictured) in Olympia, Washington, smoking and kissing his girlfried

Around 8.30pm on Tuesday, a black man was standing outside China Clipper Bar, smoking and kissing his 35-year-old girlfriend, according to Olympia police.

The woman yelled out in pain, and her boyfriend thought he had been punched in the side.

Rowe, who didn't say anything to them before the alleged attack, ran off, and was knocked unconscious after the male victim tripped him.

The victim then realized he had been stabbed in the abdomen, while the woman suffered a superficial graze wound, police said.

Rowe told police if they let him go, he would go to a Trump rally and defend them against Black Lives Matter protesters

The 47-year-old was taken to Providence St. Peter Hospital with non-life threatening injuries.

According to Lieutenant Paul Lower, Rowe later said: 'Yeah I stabbed them. I'm a white supremacist,' the Washington Post reported.

Rowe told police he was defending them and 'took a blood oath to fight on the street, and if he was let go tonight, he planned on heading down to the next Donald Trump rally and stomping out more of the Black Lives Matter group,' according to court documents cited byKOMO.

Rowe also told authorities he was in downtown Olympia because anti-police graffiti had been left in the capital, which he attributed to Black Lives Matter protesters.

An investigation into the vandalism is ongoing, and authorities have not pinpointed any suspects.

Rowe, who is held on $500,000 bail, was charged on Wednesday with two counts of second-degree assault with a deadly weapon and one count of malicious harassment under Washington's hate crime law.

'This has all the hallmarks of a hate crime. This black-and-white couple was simply expressing their love for one another,' Deputy Prosecutor Joseph Wheeler said.

Rowe also told authorities he was in downtown Olympia because anti-police graffiti (pictured) had been left in the capital, which he attributed to Black Lives Matter protesters. An investigation is still ongoing

Rowe told police he had recently been released from the state penitentiary, but they have not been able to confirm his account.

Rowe was convicted in 2008 for second-degree robbery, the Olympian reported.

Public defender Christian Cabrera said Rowe, who previously lived in Richland, had moved to across the state to Olympia about three weeks ago.