The Washington Post is reporting that the technology behemoth uncovered the Russian-backed disinformation campaign as it considers whether to testify before Congress next month.
Social media companies Facebook and Twitter have already agreed to testify.
The report said the company discovered the Russian presence by siphoning data from Twitter. The Washington Post report is based on anonymous sources familiar with the investigation.
In a statement, Google said it has a "set of strict ads policies including limits on political ad targeting and prohibitions on targeting based on race and religion."
Facebook recently shared about 3,000 Russian-backed ads with Congress.
US intelligence agencies have concluded that Russian President Vladimir Putin directed a disinformation campaign aimed at helping Donald Trump win the presidential election.
Disclaimer: No Business Standard Journalist was involved in creation of this content