A 15-year-old boy arrested over the rape of a girl in a supermarket is also being questioning on a further four sex attacks in the region.
The girl was attacked on 2 March at the Sainsbury's store on the Shires Retail Park in Leamington Spa, Warwickshire.
Detectives have been given until Saturday night to question the youth they have been holding since Wednesday.
Police said he has also been arrested in connection with four indecent assaults in the area.
Given more time
They said the incidents are not necessarily linked but they are investigating similarities.
In one of the incidents a woman was assaulted by a youth riding a BMX bike as she walked along Romeo Arbour, in Heathcote, last Saturday.
Police said the 11-year-old victim was assaulted after she left her mother and was followed into the store's toilet.
Magistrates granted police a further 17 hours to question the boy on Friday. Rewards totalling £30,000 have been offered for help catching the rapist.
Two weeks ago a list of more than 40 possible suspects was drawn up by detectives following appeals for public help.
The girl's mother spoke out a few days after the offence, and said: "As a mum I really feel guilty because I should have taken her to the toilet, but you think that they are safe."
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