The more than 3,000 Russian-bought ads that Facebook will hand over to Congress sought to stir up trouble in the Black Lives Matter movement and Hillary Clinton’s campaign, a new report said Monday.

The Russian campaign used Facebook’s ability to send contradictory messages to different users based on their politics and demographics, the Washington Post reported.

The messages showed just how sophisticated the Russian effort to influence the US campaign had been.

Investigators for Facebook, Congress and the Justice Department were troubled by the scope of the campaign, sources told the paper.

The House and Senate intelligence committees will scrutinize Facebook as they try to untangle the operation and other matters as they look at Russia’s effort to help elect Donald Trump in 2016.

“Their aim was to sow chaos,” Sen. Mark R. Warner (D-Va.), vice chairman of the Senate Intelligence Committee, told the paper.

“In many cases, it was more about voter suppression rather than increasing turnout.”

Rep. Adam Schiff of California, ranking Democrat on the House Intelligence Committee, said he hoped the ads would be made public.

“I think the American people should see a representative sample of these ads to see how cynical the Russian were using these ads to sow division within our society,” he said, noting that he had not yet seen the ads but had been briefed on them, including the ones about Black Lives Matter.

Facebook identified at least $100,000 in ads purchased through 470 phony pages and accounts.

The ads suggest that Russian operatives worked off evolving lists of racial, religious, political and economic themes.

“They used these to create pages, write posts and craft ads that would appear in users’ news feeds — with the apparent goal of appealing to one audience and alienating another,” the paper reported.

“The idea of using Facebook to incite anti-black hatred and anti-Muslim prejudice and fear while provoking extremism is an old tactic.

“It’s not unique to the United States and it’s a global phenomenon,” said Malkia Cyril, a Black Lives Matter activist in Oakland.

Social media companies “have a mandate to stand up and take deep responsibility for how their platforms are being abused,” Cyril said.