Climate activists protesting against Woodside Energy's Browse gas project outside the company's Perth headquarters have been arrested, Disrupt Burrup Hub says.
Dozens of activists gathered at the building on Tuesday morning, according to the group, during a federal cabinet visit to the Western Australian capital.
Police made several arrests and issued multiple move-on notices, a spokesman for the activists told AAP.
"A sit-in outside Woodside subsequently blocked traffic as dozens of police hauled campaigners off the road, including school children and the elderly," he said.
Photos and videos supplied by Disrupt Burrup Hub show about two dozen activists holding placards and flags blocking traffic outside the Woodside building.
Others record police arresting and carrying protesters off the road towards police vehicles as members of the group chanted "f**k up the hub".
Woodside, the operator of the Browse Joint Venture, plans to develop three gas fields about 425 km north of Broome in the offshore Browse Basin.
The proposed development includes two floating production storage and offloading facilities and a 900km pipeline to the company's existing gas plant on the Burrup Peninsula near Karratha in WA's Pilbara region.
The activist group said it could endanger marine life and contribute to the release of billions of tonnes of greenhouse gas from Woodside's Burrup Hub.
The Burrup Hub project includes the development of the Scarborough offshore gas field and expansion of the existing Pluto gas plant near Karratha in WA's Pilbara region.
WA police have been contacted for comment.