Shamima Begum, a teenager who left London to join the IS terror group in Syria, has had her UK citizenship revoked.
The decision against the 19-year-old comes after she expressed her desire to return to the UK with her newly-born child in a media interview.
Her family's lawyer said they were considering "all legal avenues" to challenge it.
Home Secretary Sajid Javid has said he would “not hesitate” to prevent the return to Britain of anyone who has supported terrorist organizations aboard.

Israel warns Lebanon of 'heavy price' as week's death toll nears 300
Israeli settler fatally shoots Palestinian in West Bank
Israel carries out rare airborne raid in Lebanon; 16 killed in strikes
US skips congressional review to approve arms sale to Israel
Flash floods in Nairobi kill 23, disrupt flights at major airport
Russia hits Ukraine with drones, missiles, kills at least 10 in Kharkiv
Partial resumption of air navigation in Qatar
Kuwait and Qatar thwart fresh wave of Iranian attacks
