The two women, aged 22 and 25, were arrested in Barcelona earlier in the week, where they were wanted for similar crimes, and are soon to be extradited back to France.

Over the summer, the duo racked up 15 victims, who were mainly women aged between 71 and 91, in Paris and the Ile de France region.

They would follow victims to their houses and force their way in, before strangling them until they lost consciousness and stealing their valuables.

Two men, aged 35 and 37, were arrested in St Ouen, North West Paris, for acting as getaway drivers for the women.

Security camera footage caught the women dressed as nurses following their victims, sometimes shouting the word 'revenge' after they had committed the crimes.

“Their strategy was well-practiced and they would complete the crime in a few seconds,” said a source close to the case.