Twitter's UK policy chief Nick Pickles told the House of Commons select committee at a hearing taking place today in Washington DC that 49 accounts linked to Russia's Internet Research Agency tweeted a collective 942 times during the Brexit campaign. They were retweeted 461 times and liked 637 times. "Forty-nine such accounts were active during the referendum campaign, which represents less than 0.005% of the total number of accounts that tweeted about the referendum," he said.

A Twitter spokesperson told us, "As we noted in our previous letters to the Committee, our investigation has been ongoing and has not been limited to the information requested by the Committee or the Electoral Commission." They confirmed the information above and said, "These tweets cumulatively were retweeted 461 times and were liked 637 times. On average this represents fewer than 10 likes per account and fewer than 13 retweets per account during the campaign, with most accounts receiving two or fewer likes and retweets. These are very low levels of engagement."

That is a pretty small number of tweets, each with low engagement, though there was no information provided on how many people may have seen the 942 tweets in question. However, as Twitter has continued to look into Russian involvement with the US presidential election, the number of users who interacted with Russian-backed accounts keeps growing. While only time will tell if that's also the case for Brexit-related activity, the US investigation suggests that number could rise.

The House of Commons select committee is hearing testimony from Google, YouTube and Facebook representatives as well.