John Worboys, the London taxi driver convicted in a series of sexual attacks on his women passengers, is linked to more than 100 cases of assault, the Scotland Yard said today.
Worboys, dubbed the "black cab rapist", is one of the most prolific sex offenders in British criminal history.
53-year-old taxi driver, who was jailed indefinitely in April 2009 after he was found guilty of 19 charges of drugging and sexually assaulting 12 women, is suspected to have attacked at least 102 women, the police said.
A Metropolitan Police spokesman said: "There is a high possibility there are more victims out there".
"The difficulty is that a large number of the women do not know whether they were raped or not," the BBC quoted the spokesman as saying. "The only person who knows is Worboys himself."
Prosecutors say he preyed on female passengers late at night. He was accused of picking his victims up at trendy west London nightspots, telling them he'd won money in the lottery, and inviting them to partake in a celebratory glass of champagne.
His offered drinks spiked with powerful prescription sedatives and over-the-counter sleeping pills.
The attacks by the cabbie from Rotherhithe, south-east London, are believed to have been carried out between 2002 and 2007 in London and Dorset, the report said.