Twitter has warned some of its users that their accounts on the messaging platform may be the target of "state-sponsored hackers."

It was unclear how many users received the warnings, which were issued over the weekend and were the first of their kind for Twitter.

A group of 15 to 20 people damaged the Germany headquarters of U.S .social media giant Facebook and daubed the message "Facebook Dislike" on its walls, police said Sunday.

The black-clad, masked vandals hurled rocks, paint and smoke bombs at the building, damaging its walls, front door and windows, in the northern port city of Hamburg around 2000 GMT Saturday.

Turkey's communications regulator has imposed an unprecedented fine on Twitter for allowing the publication of content deemed to justify terror, the state-run Anatolia news agency said Friday.

The Information and Communication Technologies Authority (BTK) has fined Twitter 150,000 lira ($50,700), the first time it has issued such a penalty to the company.

Bangladesh on Thursday lifted a ban on Facebook, three weeks after it was imposed for security reasons in the tense country, but mobile messaging apps remained barred, the telecoms minister said.

The government ordered Facebook, WhatsApp and Viber blocked last month after two opposition leaders lost their appeals against the death penalty for war crimes committed during the 1971 independence conflict.

Facebook founder Mark Zuckerberg wants to protect the rights of Muslims, saying they should not fear being "persecuted for the actions of others."

Zuckerberg said in a Facebook post that the Muslim community should not face discrimination following attacks in Paris and elsewhere linked to extremists.

Online news startup Blendle, which allows users to make small payments to read individual articles, announced plans Wednesday to launch next year in the United States.

Blendle, a Dutch-based service which has been operating in the Netherlands and Germany, hopes the "micropayments" model can help struggling news organizations as an alternative to "paywalls" or digital subscriptions, said co-founder Alexander Kloepping.

A judge opened the door Wednesday to expanding the number of drivers who can join a class-action suit against Uber contending they are treated like employees but get no employee benefits.

U.S. District Court Judge Edward Chen said that even those who accepted a contract that called for arbitration of disputes could join the lawsuit, saying the arbitration agreements are "unenforceable."

Rovio, the Finnish maker of the hugely popular Angry Birds mobile game, has appointed Kati Levoranta as its first woman chief executive officer, the company announced on Wednesday.

Levoranta, who has served as Rovio's legal director and head of European sales, will on January 1 replace Pekka Rantala, who will step down after just one year.

The EU unveiled plans on Wednesday that would allow travelers to get online streaming services like Netflix or BBC iPlayer when abroad by 2017, something currently blocked by complex copyright rules.

Europeans spend about one billion nights in other EU countries every year but face a frustrating inability to watch films and sports or listen to music on an iPad or laptop when they travel outside their home country.

Yahoo said Thursday it would seek a "reverse spinoff" that would separate the Internet company's core operations from its holdings in China's online giant Alibaba.

The Internet pioneer said the move would create two separately publicly traded companies including one with the Yahoo core which has been struggling.