Several leading news websites have been affected by malicious adverts which have caused some users to be infected by ransomware, according to the BBC.
The U.K. broadcaster reported that its own website had been targeted. It also reported that sites including MSN, the New York Times, AOL and Newsweek had been effected. MSN and Newsweek were not immediately available for comment when contacted by CNBC.
A spokesperson for the NYT told CNBC that it was still investigating whether it was affected and said the software was impacting ads from third parties that were beyond their control. AOL declined to comment.