Blood-soaked Portland protester chases down her 'attacker' after being stabbed but police say they were forced to stop investigating due to a 'hostile crowd' on the 69th day of demonstrations in the city

Bloody and gruesome video footage has emerged from Portland, Oregon that shows a female protester bleeding heavily from her chest after being stabbed by another woman.  

In the clip, which was posted to TikTok, a woman wearing a black face-mask pulls down her top to reveal a bloody knife wound. 

The shocking video which was shot in Lownsdale Square Park begins with the woman shouting 'call the police!' while the alleged knifewoman walks away from her.

At several times in the video, the knife can be clearly seen in the woman's hand. 

On Tuesday protesters once again took to the streets for the 69th straight day of demonstrations there. 

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A Portland protester ended up being stabbed on Monday night by a woman. It happened in Lownsdale Square Park which has housed protesters for months

'I told you not to f*** with us,' a man can be heard saying as the victim attempts to confront the woman who had attacked her. 

'You stabbed someone, you b****,' the man says. 'Drop the knife ma'am — you are not in danger.'

The woman ignores the request and continues to walk away with the knife on display. 

Portland Police say they were called to reports of a stabbing on Monday.  

The victim ended up being sent to hospital for treatment for non-life-threatening injuries.  

Police say the incident began after a woman entered the park to take photos and video of the area where protesters have been housed for months.

She ended up getting into an argument with another woman who then ended up stabbing her in the chest and fled the scene. 

She returned a short time later and was questioned however Portland Police have not confirmed whether an arrest has been made.

They said they had 'encountered a hostile crowd' at the scene while trying to investigate the stabbing. 

Although officers originally managed to find the knife believed to have been used, someone else picked it up and ran off with it while police were trying to secure the scene. 

'Officers were unable to safely conduct an investigation due to the hostile crowd, and supervisors made the decision to disengage,' Portland Police said in a statement. 'As the knife is evidence, it should be returned to police custody.' 

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A line of protesters blocks the street in front of the Mark O. Hatfield U.S. Courthouse during a Black Lives Matter protest on August 2, 2020 in Portland, Oregon. Portlands nightly protests have remained largely peaceful following last Thursdays announcement that federal officers would begin a phased withdrawal from the city

Some 100 Black Lives Matter demonstrators met at the Peninsula Park at around 8.30pm before starting their march towards the Police Association building downtown, The Oregonian reported.

On their way they listened to speakers, chanted and set a trash bin on fire.

Shortly before 10.30pm, police warned them to stop trying to break into the police facility or they would use force and make arrests.

Half an hour later the situation unraveled when a pickup truck sped through the street as a crowd member hurled a motorbike in front of the vehicle.

Sparks were sent flying through the air as the bike scraped along the asphalt, trapped beneath the front fender of the truck.

The driver got out of the vehicle and social media footage appeared to show him brandishing a handgun and shouting at the protesters as he fled the scene. 

An officer told the Oregonian that police were interviewing the driver.