Protesters who blocked part of Brisbane's Victoria Bridge during peak hour this morning were moved on twice by police before locking themselves together inside a canoe at South Brisbane.

The group, believed to represent Extinction Rebellion SEQ, were holding signs and handing out flyers for another demonstration in August.

Officers moved the group once to the end of the bridge and then again to the parkland outside QPAC, where they locked themselves together while sitting inside the canoe.

One protester said the reason for their action was because the Earth was facing "mass extinction".

"If we do not stop this from happening .. all life on earth is at risk," she said.

The protesters locked themselves together at South Brisbane. ( ABC News: Talissa Siganto )

Another said they would continue to peacefully protest until there was change.

"I don't necessarily want to be here but this is actually what I think is our last resort," she said.

Queensland Fire and Emergency Services crews arrived to remove the protesters.

All four protesters were taken to the Brisbane watch house and are expected be charged with public nuisance.

The incident is the third demonstration in Brisbane in a week, with more than 700 people marching from the CBD to South Brisbane on Friday protesting the Adani coal mine.

Five people also glued themselves to Russell Street in South Bank before being removed by police and seven people were arrested and detained for breaching the peace.

Last week two people were charged with public nuisance after supergluing themselves to a pedestrian crossing at Post Office Square, in Brisbane's CBD.