The head of the International Committee of the Red Cross has warned freelance journalists against traveling to parts of Syria and Iraq controlled by the Islamic State group.

Speaking at a news conference in Tokyo on Friday, ICRC President Peter Maurer said it is simply too dangerous and urged freelancers to stay away from the extremists.

"I would rather discourage you to go in those areas because from our experience as well, we know it is extremely difficult to access Islamic State group-controlled areas in a safe way at the present moment," Maurer told reporters at the Japan National Press Club.