A Christian mother trying to flee Sudan for the United States was stopped at the airport following a tip-off from her own brother.

Meriam Ibrahim spent months on death row on charges of apostasy – the crime of abandoning or disrespecting Islam – before she was freed Monday following international outcry. Amid continuing fears over her safety, she planned to fly to the United States with her husband — who is a naturalized American citizen.

But this plan failed at the last minute when Ibrahim was re-arrested at the airport by agents from Sudan’s shadowy security service. She was transferred to police custody where her lawyer told NBC News she remained early Thursday.

Authorities said she had been stopped because her travel documents were illegitimate. But in an interview with a Sudanese newspaper, her brother claimed he tipped off police that she had been “kidnapped” by her husband who planned to take her to the U.S. against her will.

Read more at NBC News