The Extinction Rebellion group are demanding that Environment Minister Sussan Ley drop an appeal against a federal court ruling that the government has a duty of care to protect Australian children from climate change, for a third time within a week.

Activists could be seen splashing red paint and tomato sauce on the floors and walls of the foyer, on a Facebook livestream from the group.

An Extinction Rebellion spokesperson estimated there were 10-12 protesters on the scene during the protest, but protesters had been cleared out as of 2.15pm.

"About 12.30pm today ACT Policing responded to a disturbance at the John Gorton Building in Parkes," an ACT Policing spokesperson said in a statement.

"AFP Search and Rescue also attended, to remove three people who had glued themselves to fixtures in the building foyer. Other damage was caused to the interior of the building."

"Eight people have been taken into custody. Police expect to lay charges including damaging property and trespass," the ACT Policing spokesperson said.

The action extends on from protests outside the Department of Agriculture, Water and the Environment on Wednesday, before moving onto Kings Avenue Bridge to block evening traffic.

This preceded Tuesday's protests where structures were assembled to disrupt traffic a the corner of Marcus Clarke and Barry Drive in Civic, with activists targeting the Australian Petroleum Production and Exploration Association.

"We are here at the department of Sussan Ley demanding she meet with us and asking her staff to join us in demanding that she drop the appeal," a spokesperson said in a statement.

"We implore that all people have a duty to act when our government fails to protect us, no matter who employs them," a spokesperson said ahead of the protest.

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