A Swiss Muslim-convert has been arrested at the Turkish border on suspicion of intending to take her four-year-old son to Syria after being radicalised online by ISIS.

Franziska Mirella, 29, has been sent back to Switzerland where she could face trial for supporting a banned terror organisation.

Her Egyptian husband, Mahmoud, has been awarded custody of their four-year-old son Adam.

Franziska Mirella, 29, has been sent back to Switzerland where she could face trial for supporting a banned terror organisation

Franziska Mirella was stopped with her four-year-old son Adam at the Turkish border after her husband raised the alarm

Franziska converted to Islam when she married her husband Mahmoud and moved to his homeland, Egypt.

While living in Egypt, she had started to follow increasingly radical Islamic services on the Internet, and according to her husband had come into contact with jihadists via social media.

Mahmoud, who married Franziska five years ago, said online jihadi supporters had convinced his wife that he was not a true Muslim.

They persuaded her together with her son to come to Syria in order to live under the caliphate.

Franziska (pictured before her conversion to Islam) threw out all her son's toys, deeming them 'un-Islamic' and banned him from watching television. Finally she stole everything she owned in order to fund their trip to Syria

Adam (right) was briefly taken into care and now a court in Greece has given his father (left) custody. He has now headed back to Egypt to be with his family

Her family confirmed that she had started behaving strangely, even changing her name to Umm Adam, which means simply mother of Adam.

Franziska threw out all her son's toys, deeming them 'un-Islamic' and banned him from watching television. Finally she sold everything she owned in order to fund their trip to Syria.

But the wannabe jihadi bride was stopped heading across the border from Greece into Turkey on her journey to Syria after her husband raised the alarm.

Adam was briefly taken into care and now a court in Greece has given his father custody. He has now headed back to Egypt to be with his family.

'Adam is doing okay, he has a bad cold from his long journey under harsh conditions, but he's basically on the mend and doing well,' Mahmoud said.

Adam (right) was briefly taken into care and now a court in Greece has given his father Mahmoud (left) custody. He has now headed back to Egypt to be with his family.

Mahmoud confirmed that his son was ok and was just recovering from a cold after the trip

'He is particularly pleased that he is allowed to play with his toys again.'

He added he did not know why this had happened to his wife, but confirmed: 'It was likely she had been completely brainwashed.'

He said she was not the same person anymore and that her family back in Switzerland were shocked at what had happened, because they had always supported her in her decision to move to Egypt to live with him.