Twitter disowns RT and Sputnik ads amid election interference fears

Twitter says "retaliatory measures" would follow, according to RIA Novosti news agency [in Russian].

Meanwhile, responding to the allegations, RT's deputy editor-in-chief Kirill Karnovich-Valua said the outlet "has never been involved in any illegal activity online, and that it never pursued an agenda of influencing the US election through any platforms".
His comments followed those of RT editor-in-chief Margarita Simonyan, who used Twitter's own platform to accuse the social network of pushing them to "spend big" during the election.
Twitter did not comment when asked about the accusation, Reuters news agency said.
Sputnik told news agency AFP it "has never used advertising on Twitter".
Twitter is one of a number of companies keen to show they can self-regulate after it was found that Russian-backed groups were exploiting its ad platform. Its lawyers are due to appear before public hearings of the Senate and House intelligence committees to discuss possible interference on 1 November.
Russia has repeatedly denied claims that it interfered in the 2016 elections. US intelligence services accuse the country of trying to sway the vote in Donald Trump's favour in various ways, including by spreading fake news and hacking the Democratic National Committee (DNC) networks in order to undermine rival Hillary Clinton.
The allegations have sparked an investigation into possible links between Russia and Mr Trump, led by special counsel Rob Mueller, a former FBI director.

Mr Trump denies there was any collusion.