However, it now appears that further investigation has found evidence of Russian-bought election ads on YouTube, Google Search, Gmail and the company's DoubleClick ad network ... "We are deepening our investigation of diversion attempts of our systems, and work with researchers and other companies, and give our assistance to the ongoing investigations", said Google.
The Washington Post noted that until now, Google has "mostly avoided the scrutiny" that's focused on Facebook, which recently provided Congressional investigators with about 3,000 Russian-bought ads. Google and Twitter reportedly did not collaborate on the effort, which is supposedly still in its early stages.
While Facebook and Twitter have already indicated that they have discovered content funded by Russian interests, Google remains very discreet on the subject, even if the group was also invited by Congress to testify in a public hearing on the 1st of November. Previously, Google said publicly that it had not yet found evidence of ads linked to the Kremlin on its platforms.
It is unclear if some of the same ad buyers on Facebook also purchased ads on Google.
Parscale told correspondent Lesley Stahl that his primary job was to send hundreds of thousands of "carefully-tailored, low-priced digital ads" to millions of people on Google search, Facebook, Twitter, and other platforms.More news: Egypt's Chances of Passing Group Qualifications Improves after Uganda and Ghana Draw
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The U.S. Congress has opened multiple investigations to determine the level of Russian interference in the 2016 election.
Facebook announced last month it had unearthed $100,000 in spending by the Internet Research Agency and, under pressure from lawmakers, has pledged to be more transparent about how its ads are purchased and targeted.
In a blog post, Elliot Schrage, vice-president of policy and communications, wrote that he believed around 10 million people would have seen some of the adverts, but that 25% of them would not have been seen by anybody.
Twitter, meanwhile, also "proactively" shared with Congress a "round-up of ads" that Russia's state-run TV network Russia Today (RT) targeted at US users in 2016.