Approximately 40 security agents detained Ibrahim, her husband, and two young children Monday at the airport as they were preparing to depart Sudan for the U.S., according to BBC sources.
Ibrahim was released on Monday after her death sentence was reportedly overturned. She was arrested in February and convicted of apostasy while she was eight months pregnant. Her 20-month-old-son went with her to prison.
An Egyptian court ruled she would die by hanging for renouncing the Muslim faith of her father, who left the family when Ibrahim was six years old. Ibrahim was raised a Christian by her mother. The court also convicted Ibrahim of adultery for marrying a non-Muslim man, and sentenced her to be flogged.
While in prison, she gave birth to a baby girl on May 26.
It is unclear on what grounds Ibrahim and her family have been detained.