Russia slows down Twitter, part of social media clampdown

Russian authorities said Wednesday they are slowing down the speed of uploading photos and videos to Twitter over its failure to remove banned content — part of growing efforts to curb social media platforms that have played a major role in amplifying dissent.

The state communications watchdog, Roskomnadzor, said it began the slowdown after it said Twitter failed to remove content encouraging suicide among children and containing information about drugs and child pornography.

Twitter responded by emphasizing its policy of zero tolerance for child sexual exploitation, promotion of suicide and...