Environmental group Greenpeace must pay more than $660 million US in damages for defamation and other claims brought by a pipeline company in connection with protests against the Dakota Access oil pipeline's construction in North Dakota, a jury found Wednesday.

Dallas-based Energy Transfer and subsidiary Dakota Access had accused Netherlands-based Greenpeace International, Greenpeace USA and funding arm Greenpeace Fund Inc. of defamation, trespass, nuisance, civil conspiracy and other acts.

Greenpeace USA was found liable for all counts, while the others were found liable for some. The damages owed will be spread out in different amounts over the three entities.

Energy Transfer called Wednesday's verdict a "win" for "Americans who understand the difference between the right to free speech and breaking the law."

Greenpeace said earlier that a large award to the pipeline company would threaten to bankrupt the organization.

Following the nine-person jury's verdict, Greenpeace's senior legal adviser said the group's work "is never going to stop."

"That's the really important message today, and we're just walking out, and we're going to get together and figure out what our next steps are," Deepa Padmanabha told reporters outside the courthouse.

The organization later said it plans to appeal the decision.

"The fight against Big Oil is not over today," Greenpeace International general counsel Kristin Casper said. "We know that the law and the truth are on our side."

Casper said the group will see Energy Transfer in court in July in Amsterdam in an anti-intimidation lawsuit filed there last month.

What the allegations were against Greenpeace

The case reaches back to protests in 2016 and 2017 against the Dakota Access pipeline and its Missouri River crossing upstream of the Standing Rock Sioux Tribe's reservation. For years, the tribe has opposed the line as a risk to its water supply.

WATCH | Judge allows North Dakota pipeline construction, but government seeks voluntary 'pause':

Judge allows North Dakota pipeline construction, but government seeks voluntary 'pause'

The Standing Rock Sioux Tribe's attempt to halt construction of an oil pipeline near its North Dakota reservation failed in federal court Friday, but three U.S. government agencies asked the pipeline company to "voluntarily pause" work on a segment that tribal officials say holds sacred artifacts.

The multi-state pipeline transports about five per cent of the United States's daily oil production. It started transporting oil in mid-2017.

Energy Transfer lawyer Trey Cox had said Greenpeace carried out a scheme to stop the pipeline's construction. During opening statements, he alleged Greenpeace paid outsiders to come into the area and protest, sent blockade supplies, organized or led protester training, and made untrue statements about the project to stop it.

Lawyers for the Greenpeace entities had said there was no evidence to the claims, and that Greenpeace employees had little or no involvement in the protests, adding that the organizations had nothing to do with Energy Transfer's delays in construction or refinancing.

Details of the damages

The damages total nearly $666.9 million US ($958 million). The jury found Greenpeace USA must pay the bulk of the damages, nearly $404 million US ($580 million), while Greenpeace Fund Inc. and Greenpeace International would each pay roughly $131 million US ($188 million).

Energy Transfer said in a statement to The Associated Press: "While we are pleased that Greenpeace has been held accountable for their actions against us, this win is really for the people of Mandan and throughout North Dakota who had to live through the daily harassment and disruptions caused by the protesters who were funded and trained by Greenpeace."