Twitter

Several prominent Twitter accounts were vandalized early Wednesday by hackers who posted images of the Turkish flag along with anti-German and anti-Dutch messages.

After his re-election in 2009, anti-government protesters used Twitter to help coordinate and organize the Green Movement, sometimes called the "Twitter revolution."

Iran's leaders responded by blocking access to Twitter, Facebook and other social media sites. Ordinary Iranian citizens still were able to access Twitter using illegal VPN software.

Gurmehar Kaur has been receiving threats and abuse after her campaign against a right-wing student union.

But, Sehwag's tweet was directed at an earlier campaign, when she said her father, a soldier who died in Kargil, was killed by war, not Pakistan.

He tweeted a picture of himself holding a sign saying, "I did not score two triple centuries, my bat did."

It has been retweeted more than 20,000 times and received 33,000 "likes" since then, with many, including Bollywood actor Randeep Hooda praising the tweet.

Bana Alabed, the 7-year-old girl whose Twitter updates during last year's brutal siege of Aleppo drew global attention, tweeted a video of herself meeting Abdel Basit Al-Satouf at a hospital in Turkey and taking the boy gifts.

"Yeeeeeeeeeeeees I am very happy, I'm meeting (Abdel Basit) the Syrian boy who lost both legs to bombing," she said.

It comes in the wake of heavy criticism about harassment on its platform and a failure to find a buyer after months of rumours about takeovers.

It has announced three main changes, which will be rolled out in the "coming weeks".

It includes moves to identify people who have been permanently suspended and stop them creating new accounts.

Harassment

The ACLU has pledged to fight President Donald Trump's temporary ban on refugees and immigrants from seven Muslim-majority countries.

The civil rights group has reportedly raised more than $24m in online donations in the past few days.

Taxi hailing company Lyft previously said that it would donate $1m to the ACLU over the next four years.

Laila Alawa is a 25-year-old Muslim woman living in D.C. Troy Pflum is a 49-year-old Lutheran man living in Wisconsin.

She's a moderate who voted for Hillary. He's a Republican who voted for Trump.

But Pflum, a truck driver and jewelry salesman, has become an important Twitter ally to Alawa.

The largest network ties together more than 350,000 accounts and further work suggests others may be even bigger.

UK researchers accidentally uncovered the lurking networks while probing Twitter to see how people use it.

Some of the accounts have been used to fake follower numbers, send spam and boost interest in trending topics.

Hidden purpose

CEO Jack Dorsey apologized Saturday for inadvertently signing up about 560,000 users to follow accounts controlled by the Trump administration, including the @POTUS Twitter handle after it switched over to President Trump.

Dorsey said the issue has been corrected.

He explained in a series of tweets that users who followed President Obama's new handle -- @POTUS44 -- after noon on Friday were automatically set to follow the Trump-run @POTUS handle.

Mr Trump inherited the official presidential account as he was sworn in as America's 45th president.

The original image showed flag-waving crowds in front of the US Capitol.

But it was changed about an hour later, amid claims from Mr Trump's opponents that crowds at his inauguration were not as large as in 2013.

Trump supporters on social media branded claims Mr Trump was trying to make his inauguration appear better-attended "pathetic" and a "non-story".