Internet giants Facebook and Google on Thursday testified before a parliamentary committee in Singapore as they warned the city-state against introducing new laws to combat "fake news", saying that existing legislation is adequate to address the problem.

Britain's culture minister said Thursday that Facebook chief Mark Zuckerberg's plan to fix problems at the world's biggest social media network did not go far enough.

YouTube has tightened its restrictions on firearms videos.

The video-serving network owned by Google is banning videos that provide instructions on how to make a firearm, ammunition, high-capacity magazines, and accessories such as bump stocks and silencers.

In the wake of a privacy scandal involving a Trump-connected data-mining firm, Facebook CEO Mark Zuckerberg embarked on a rare media mini-blitz in an attempt to take some of the public and political pressure off the social network.

But it's far from clear whether he's won over U.S. and European authorities, much less the broader public whose status updates provide Facebook with an endless stream of data it uses to sell targeted ads.

Facebook chief Mark Zuckerberg, breaking his silence over the data scandal roiling the social network, acknowledged Wednesday that the company had made "mistakes" and needed to "step up" to fix the problem.

"We have a responsibility to protect your data, and if we can't then we don't deserve to serve you," Zuckerberg said in his first public comments since the scandal broke last weekend.

It was one of hundreds of cute questionnaires that were shared widely on Facebook and other social media, like "Which Pokeman Are You?" and "What Are Your Most Used Words?"

Cambridge Analytica, the British firm at the center of a major data scandal rocking Facebook, suspended its chief executive Tuesday as lawmakers demanded answers from the social media giant over the breach.

Twitter shares were hammered Tuesday following reports that Israel was weighing action against the company, adding to the growing woes of social media stocks.

China has announced it is building the world's fastest wind tunnel to develop a new generation of super-fast airplanes, but it could also be used for hypersonic missile technology.

A nine-year-old boy shot dead his sister, 13, in the southern U.S. state of Mississippi following an argument about a video game controller, local media reported Monday.