A woman has foiled an attempted attack by a man on a bike in Cambridge.
The assault, which happened in Boltolph Lane at about 0300 BST on Saturday, is being linked with several other indecent assaults in the city.
The woman, in her 20s, was grabbed as she walked home but she fought back and he rode off. The man is thought to be behind at least eight other assaults.
"This latest incident is extremely similar to the other attacks in this series," Det Sgt Phil Priestley said.
"We have reasonable grounds to believe that they have all been committed by the same man.
"It is reasonable to suspect that someone out there knows who he is and I would urge them to do the right thing and get in touch.
"We have increased patrols in the areas where offences have been committed and would urge women to take the usual sensible precautions of not walking at night and early in the morning alone."
The man has been described as white, 20 to 30, 5ft 10in to 6ft (1.78m to 1.83m) tall, of medium build and physically strong.
He has short dark hair, stubble and wears a black jacket over a grey hooded jumper, which may have a number three on the back.