CNN

A British tourist has been arrested in Dubai on charges of extramarital sex after telling police a group of British nationals raped her in the United Arab Emirates, according to a UK-based legal advice group called Detained in Dubai.

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"This is tremendously disturbing," Radha Stirling, the group's founder and director, said in a statement.

"Police regularly fail to differentiate between consensual intercourse and violent rape.

"Victims go to them expecting justice, and end up being prosecuted. They not only invalidate their (victimization); they actually punish them for it."

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According to Detained in Dubai, the woman was "gang-raped" by the British nationals.

Stirling said the woman had been released on bail but had had her passport confiscated.