The four climate change protesters in a canoe blocked traffic in the heart of Brisbane this morning have been taken to Brisbane watch house.

At about 8.30am this morning, an hour after the protest began, police officers dragged the canoe, with protesters still inside, off the side of Stanley Street and onto the footpath.

Firefighters began cutting the activists free with grinders about 30 minutes later and the activists eventually released themselves just before 10am.