French media report four police officers are in custody in connection with the alleged rape of a Canadian woman at the Paris police headquarters.

Published reports say the 34-year-old Toronto woman is the daughter of a Canadian police officer and may herself be a police officer, too.

The reports allege the woman met with the officers, who are part of an anti-gang squad, at an Irish pub Tuesday night and went with them to the unit's headquarters.

They cite sources saying she left distraught the next morning and told another officer that she had been raped.

They say three of the officers are accused of being directly involved in the assault, while the other allegedly spoke to the woman after it happened.

The case is being handled by the country's police watchdog and it's reported DNA tests are being conducted.

The officers have reportedly denied the allegations.

French Interior Minister Bernard Cazeneuve vowed today to take "all the necessary measures" if the allegations turn out to be true.