Twitter has tried to stand out with users and advertisers by emphasising live events and instant news.
James Comey's book, which is scheduled to be released on Tuesday, was the subject of five of eight tweets sent by the president on Sunday morning.
Twitter is testing allowing tweets to be expanded to 280 characters -- double the existing limit -- in the latest effort to boost flagging growth at the social network.
The report which was published by Qatar Television, part of QMC, shows that the blockaders’ media outlets have published at least 1,120 abusive articles since the beginning of the siege in early June.
Donald Trump's new communications chief has deleted tweets in which he shared views contrary to the US presidents' own, saying they were a distraction.
Nepal on Tuesday released a British tourist arrested for allegedly joining a protest against the country's new constitution, days after a Canadian's visa was revoked over his political tweets.