Radical cleric Abu Qatada said to be al-Qaeda’s face in Europe was arrested by British police and told that he would be deported to Jordan,the BBC reported.
He is expected to appear at the Special Immigration Appeals Commission,when the home secretary will update MPs on his case.
The European Court of Human Rights blocked his deportation to Jordan in January,saying evidence obtained by torture might be used against him.
Ministers have been seeking assurances from Jordan this will not be the case.
The Home Office had previously said it was making good progress in obtaining those guarantees.
The British authorities have been trying to deport Qatada,a Palestinian-Jordanian preacher,described in Spanish and British courts as risk to security.
Home Secretary Theresa May travelled to Jordan in March for talks with the king and ministers on the case of the 51-year-old Palestinian-Jordanian,whom ministers have described as extremely dangerous.