The Home Office has increased its powers to strip jihadists fighting in Syria of their British nationality.
A statement on Sunday night said: "Citizenship is a privilege, not a right, and the Home Secretary will remove British citizenship from individuals where she feels it is conducive to the public good to do so."
Benjamin Ward, deputy director of Human Rights Watch Europe and Central Asia Division, said: "If there is a national security dimension to the stripping of citizenship and if that is something that would be known to the other country of nationality, then that would give rise to concern.
"It's obviously very important that in looking at these issues the Government complies with its human rights obligations."
More top news
A sailor has been rescued after two months lost at sea, during which he was forced to eat seagulls for survival.
Former Leicester City and England striker Frank Worthington is suffering from Alzheimer's disease, according to his daughter.
This is the sight that greeted one environmental conservationist - a deer with its head stuck in a light globe.