Yvonne Bray, took her daughters Gemma, 15, and Katie, 13, to New York shortly after Christmas for a shopping trip but was taken into hospital when she fell ill with pneumonia during their visit.

The girls were then told they could not wait at the hospital and as minors would have to be taken into care.

Social workers took them to a municipal orphanage in downtown Manhattan, where they were separated, strip-searched and questioned before being kept under lock and key for the next 30 hours.

The two sisters were made to shower in front of security staff and told to fill out a two-page form with questions including: "Have you ever been the victim of rape?" and "Do you have homicidal tendencies?"

One question asked "are you in a street gang?" to which Gemma replied: "I'm a member of Appledore library."

Their clothes, money and belongings were taken and they were issued with regulation white T-shirt and jeans. Katie said: "It was like being in a little cage. I tried to go to sleep, but every time I opened my eyes, someone was looking right at me."

Eventually Bray discharged herself, and - still dressed in hospital pyjamas - tracked down the girls.

She said: "It is absolutely horrendous that two young girls were put through an ordeal like that. They were made to answer traumatic questions about things they don't really understand and spend over 24 hours under surveillance."

Since returning home, Bray has received a letter from the US Administration for Children and Families, notifying her that, because the children were admitted to the orphanage, she is now "under investigation."