Sajid Javid has attacked some critics of the government's Prevent anti-terror scheme for being "on the side of the extremists."
The Home Secretary warned there were organisations putting out propaganda and false information to turn people away from Prevent, which aims to combat radicalisation that might lead people into terrorism.
"There are organisations out there that are trying to find ways to warp young people's minds and they put out what you might call propaganda or false information to try and turn people away from it. We have to fight against that," he said.
Mr Javid did not name any groups but the most vocal critics have been Cage, Prevent Watch and the Muslim Council of Britain.