..Thousands of videos which help radicalise young men are easily available
...Search engines and social media rely on users to 'flag up' offensive material
Internet giants were last night slammed for refusing to remove extremist websites.
Search engines such as Google and Yahoo must do more to shut down hate-filled sites in the wake of the Woolwich attack, MPs said.
Thousands of videos which help to radicalise impressionable young men are easily available on YouTube.
And within hours of the execution of Drummer Lee Rigby, 25, vile messages praising the attack and encouraging further outrages appeared on Twitter.
Police have seized computers since Wednesdays atrocity and are still investigating if the two fanatics who beheaded the soldier were indoctrinated by online terror videos. Michael Adebolajo, 28, was radicalised by a banned extremist group whose members use the internet to recruit impressionable young men.
Search engines and social media websites say they rely on members of the public to flag up incendiary material. But critics last night called for more investment to be used to stop the spread of radical videos.
