Two prominent US bloggers have been banned from entering the UK, the Home Office has said.
Pamela Geller and Robert Spencer co-founded anti-Muslim group Stop Islamization of America.
They were due to speak at an English Defence League march in Woolwich, where Drummer Lee Rigby was killed.
A government spokesman said individuals whose presence “is not conducive to the public good” could be excluded by the home secretary.
He added: “We condemn all those whose behaviours and views run counter to our shared values and will not stand for extremism in any form.”
Ms Geller, of the Atlas Shrugs blog, and Mr Spencer, of Jihad Watch, are also co-founders of the American Freedom Defense Initiative, best known for a pro-Israel “Defeat Jihad” poster campaign on the New York subway.
The UK should never become a stage for inflammatory speakers who promote hate”
On both of their blogs the pair called their bans from entering the UK “a striking blow against freedom” and said the “the nation that gave the world the Magna Carta is dead”.