Blair: Assad opposition 'increasingly led by extremists'

Tony Blair told ITV News that Syria has suffered a "humanitarian crisis of enormous proportions."

"If we don't help the sensible people opposed to Assad, this opposition to Assad will increasingly be led by the extreme groups - and is increasingly being led by the extreme groups," he warned.

In an interview with ITV News Economics Editor Richard Edgar in Davos, He said President Obama's renewed mandate presented an "opportunity for us to try and go back" for discussions with Russia and China but it is "a very difficult situation."

"Once again, the problem is that if you intervene, you have a problem, but if you don't, the problem doesn't go away and sometimes it becomes worse."