Experts have warned that online access is "totally down" in North Korea as the nation experiences serious internet problems.
It is not immediately clear if the internet connectivity problems were an act of retribution for a major intrusion at Sony Pictures Entertainment which the FBI last week linked to North Korea.
The White House declined to comment on the problems but State Department spokeswoman Marie Harf told reporters that of the federal government responses, "some will be seen, some may not be seen".
Some of the biggest names in music and showbusiness have been joining the tributes to singer Joe Cocker, who has died aged 70.
They include musicians such as Bryan Adams and Aerosmith frontman Steven Tyler, along with comedian Ricky Gervais and Hollywood star Val Kilmer.
Former England cricket captain Michael Vaughan, who is also from Sheffield, joined the tributes.
Police Scotland has appealed to any people who took any video footage or photographs of the bin lorry crash in Glasgow's George Square to send it by email to officers.
Ten people have been injured at a Christmas market in Nantes, western France, after a man drove a van into shoppers, Reuters reported, citing an official at the local prefecture.
Five people suffered serious injuries, including the driver, the official said.
According to local newspaper Ouest France, citing a police officer and witnesses on the scene, the driver of the white van shouted "Allahu Akbar" ("God is greatest" in Arabic) and then stabbed himself with a knife.
The Christmas market was evacuated and secured by police.
Beatles legend Sir Paul McCartney has joined the tributes to Joe Cocker, the singer who died today at the age of 70.
Sir Paul said:
Police Scotland has confirmed that eight people are now receiving treatment for their injuries following a bin lorry crash in Glasgow.
Officers earlier confirmed six people had died following the incident:
Joe Cocker, who has died aged 70, was awarded the OBE in 2007 for his services to music.
The award was in recognition of a long musical career that also included a Grammy award in 1983 for 'Up Where We Belong', the duet Cocker performed with Jennifer Warnes.
The track is well known for featuring on the soundtrack for the film 'An Officer and a Gentleman'.
Singer Joe Cocker has died aged 70, following a battle with lung cancer.
He became famous the world over for hits such as 'Up Where We Belong' and his cover of the Beatles classic 'With A Little Help From My Friends'.
ITV News Correspondent Lewis Vaughan-Jones reports on the singer's remarkable life.
Talks aimed at breaking political deadlock in Northern Ireland are heading towards their conclusion.
The crisis could threaten the future of devolution in the region unless a deal is reached by the end of today.
ITV News Reporter Marc Mallett reports from Belfast.