Protesters in Portland smash windows and try to set Starbucks on fire in ...

Protests in Portland continued on the eve of the election on Monday as BLM demonstrators destroyed a Starbucks and clashed with police.

At least two people were arrested amid the violence during which windows at Portland State University's public safety office were smashed.

Protesters also threw a flammable liquid inside the Starbucks, whose walls were graffitied with 'BLM' and 'ACAB'.

Protests in Portland continued on the eve of the election on Monday as BLM demonstrators destroyed a Starbucks and clashed with police

Protests in Portland continued on the eve of the election on Monday as BLM demonstrators destroyed a Starbucks and clashed with police

At least two people were arrested amid the violence during which windows at Portland State University's public safety office were smashed

At least two people were arrested amid the violence during which windows at Portland State University's public safety office were smashed

The Multnomah County Sheriff's Office said they stopped the 'possible arson' and declared an unlawful assembly, ordering the group to leave.

Protesters had gathered in a park at 9pm and marched together chanting the name of Jason Washington, a black man shot and killed by PSU campus police in 2018.  

Unrest has gripped the Oregon city for more than 100 days following the death of George Floyd, and it has become a symbol of the US's stark divisions.

It comes as the FBI warned of the potential for more armed clashes in Portland linked to the US election, with the National Guard being readied for riots.

Protesters threw a flammable liquid inside the Starbucks, whose walls were graffitied with 'BLM' and 'ACAB'

Protesters threw a flammable liquid inside the Starbucks, whose walls were graffitied with 'BLM' and 'ACAB'

The Multnomah County Sheriff's Office said they stopped the 'possible arson' and declared an unlawful assembly, ordering the group to leave

The Multnomah County Sheriff's Office said they stopped the 'possible arson' and declared an unlawful assembly, ordering the group to leave

Protesters had gathered in a park at 9pm and marched together chanting the name of Jason Washington, a black man shot and killed by PSU campus police in 2018

Protesters had gathered in a park at 9pm and marched together chanting the name of Jason Washington, a black man shot and killed by PSU campus police in 2018

The fiercely polarized vote, which could see President Donald reelected, or defeated by his Democratic rival Joe Biden, has spurred fears of more deadly street violence.

Downtown businesses were boarding up windows once again as protests are planned for either a or a Biden win, or even a state of limbo, with delays in the vote-counting expected nationwide due to a surge in mail-in voting during the pandemic.

'The thing that is the most concerning to me is the potential for armed clashes between opposing groups,' FBI Portland Special Agent Renn Cannon told AFP.

Protesters with the right-wing Proud Boys and other similar groups have highlighted the deadly shooting of a protestor in Portland

Protesters with the right-wing Proud Boys and other similar groups have highlighted the deadly shooting of a protestor in Portland

'That could escalate into a dangerous situation where, if tempers are heated, you could end up with an unfortunate or tragic act of violence,' he added, pointing to a deadly shooting of a far-right supporter in the city in August.

The 250-strong Portland office has devoted additional resources to election crimes including voter suppression as well as fraud and foreign cyber threats, said Cannon.

Meanwhile Governor Kate Brown on Monday issued an executive order handing Portland policing to state forces, effectively overruling the city's ban on tear gas, and putting the National Guard on standby.

'This is an election like no other in our lifetime,' she warned.

Brown's warnings about white supremacists have drawn scorn from local conservatives including talk-radio host Lars Larson, who Monday accused her of 'deafening silence' about 'Antifa and Black Lives Matter violence' over five months of protests.

But while Oregon is a safe Democratic state, Portland's Republican hinterland has made it a focus for protests from all ideologies, with further demonstrators flying in from across the country this summer.

Oregon Police have squared off with Portland protesters through tear gas during protests in recent months

Oregon Police have squared off with Portland protesters through tear gas during protests in recent months

FBI agents are being 'extra attentive' to any threats that could 'reduce the ability for people to exercise their first amendment rights or exercise the right to vote,' said Cannon.

Officials' fears of renewed violence were echoed by voters Monday, including restaurant cook Leigh Smith.

'I've seen everybody's boarding up already and I'm like 'oh geez,'' said the 35-year-old, after mailing her ballot near the downtown courthouse that became an epicenter of earlier demonstrations.

'It's really a wild card situation. It could be really chill... it could become chaotic.'

One cause for optimism is that Oregon votes entirely

read more from dailymail.....

NEXT Richmond Tigers AFL star Marlion Pickett opens up in book Belief on troubled ...