Sanders told Russia is trying to help his campaign

Washington (CNN)Sen. Bernie Sanders said Friday that his campaign was briefed about Russian efforts to help his presidential campaign, intensifying concerns about the Kremlin's role in the US presidential race.

It remains unclear how Russia is attempting to help Sanders, according to The Washington Post, which first reported the effort. The revelation comes a day after it was reported that the US intelligence community believes Moscow is taking steps to help President Donald Trump win and at a time when Sanders is emerging as the Democratic front-runner.