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A number of pipeline protesters rappelled from the Ironworkers Memorial Bridge in Vancouver on Tuesday morning.

They are still there as of Tuesday afternoon.

There are seven climbers rappelling from the bridge, while five additional climbers are on the bridge’s catwalk.

WATCH: Anti-pipeline protesters raise the stakes

1:57 Anti-pipeline protesters raise the stakes Anti-pipeline protesters raise the stakes

Greenpeace Canada is taking responsibility for the aerial blockade, which it says is to protest the Trans Mountain oilsands oil tanker traffic.

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The climbers say they are currently in the path of the oilsands oil tanker, Serene Sea, which is currently docked at the Vancouver terminal. They say the tanker was scheduled to leave port on Tuesday morning but is now being blocked from leaving by the climbers.

However, in a statement to CKNW, Kinder Morgan said “there is no impact to our operations at this time as there are no vessels scheduled to arrive at or depart Westridge Marine Terminal [Tuesday] morning.”

The climbers plan to raise banners reading “Trudeau or Crudeau: Choose”, “Don’t bank on pipelines” and “Respect Indigenous Rights”.

The climbers say they will also raise six additional banners reading “Protect Water #StopPipelines,” “Protect Water” and “Protect the Salish Sea” in different languages.

READ MORE: Vancouver city council candidate Jean Swanson arrested at Burnaby pipeline protest

A Vancouver police boat is on scene and monitoring the situation.

We are monitoring a protest on the #IronWorkersMemorialBridge. @VPDMarineUnit are on scene assessing the situation. Public safety, including the safety of the protesters & our officers, is our priority. There's no disruption to vehicle traffic on the bridge at this time. #VPD — Vancouver Police (@VancouverPD) July 3, 2018

Traffic on the bridge is not affected at this time.

“Prime Minister Trudeau is standing on the wrong side of history,” Mike Hudema, a Greenpeace Canada spokesperson and climber based in Vancouver, said in a release. “Climate leaders don’t choose to buy pipelines. World leaders cannot be allowed to approve projects that violate the rights of Indigenous Peoples. The world is watching the choices you make next, Mr. Justin Trudeau.”

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PHOTOS of the protest:

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3:13 Pipeline protesters rappel from Ironworkers Memorial Bridge Pipeline protesters rappel from Ironworkers Memorial Bridge