Major websites, including those of the UK government and news outlets such as Financial Times, New York Times and Bloomberg, are down.
According to Al Jazeera, CNN and France’s Le Monde started showing error messages that appeared on the websites around 10:00 GMT.
The news outlet said it was also affected by the outage. The cause of the disruption is yet to be known.
Separately, Amazon.com Inc’s retail website, also seemed to face an outage.
Britain’s Guardian newspaper said its website and app were being affected.
Sites of some other British news media were also not immediately loading.