Hundreds of people gathered in Los Angeles at the weekend to protest against climate change and show support for activists warning against the construction of an oil pipeline in North Dakota.

A number of Hollywood stars including Mark Ruffalo and Susan Sarandon were among the 800 people who attended to rally.

Sarandon told the group: “We can do it. We can stop fracking. We can stop the pipeline. But really it’s only because of great numbers of people.”

Other attendees included Shailene Woodley who was arrested earlier this month in North Dakota while protesting against the planned pipeline.

In North Dakota, more than 80 protesters were arrested on Saturday after clashing with police near a pipeline construction site.

The Standing Rock Sioux tribe and environmental activists have been protesting construction of the 1,100-mile (1,886-km) pipeline in North Dakota for several months, saying it threatens the water supply and sacred sites.

The pipeline, being built by a group of companies led by Energy Transfer Partners LP, would be the first to bring Bakken shale from North Dakota directly to refineries on the US Gulf Coast.