"The Counter Extremism Project, a research nonprofit, said she promoted ISIS propaganda during her time with the group, tweeting in 2014 her intention to burn her US passport and calling for violent attacks in the US."

"Prof Ian Acheson, advisor to the Counter Extremism Project, said: 'We must take responsibility for our own citizens suspected of serious terrorist offences overseas.
'They need to be returned to this county and held accountable in our courts for their crimes and, if convicted, serve sentences here.'"