https://www.reuters.com/article/us-usa-trump-russia-twitter/twitter-says-it-suspends-hundreds-of-russia-linked-accounts-briefs-u-s-congressional-aides-idUSKCN1C331G >Twitter said on Thursday it had suspended hundreds of Russian-linked accounts and would ramp up enforcement of its spam rules as it probes online campaigns to influence the 2016 U.S. election.