News agency Reuters has been hacked for the third time in a month, with an article falsely claiming that Saudi Arabia's foreign minister Saud al-Faisal had died.

Hackers first hit the agency's blogging platform at the beginning of August, with claims that the Syrian rebel army was on the retreat.

Two days later the agency's tech news Twitter feed was taken over and pro-Syrian government messages posted.

It is unclear who is behind the hack.

Reporting on the breach, Reuters said that cyberwar between the pro and anti-government factions in Syria had intensified with Saudi Arabia emerging as a staunch opponent of Assad.