Police in Oxford hunting for two men who allegedly raped a 14-year-old schoolgirl have issued descriptions of the attackers.

One is aged in his mid 20s and the other is either early 20s or in his teens, officers said.

The girl, dressed in her school uniform, was grabbed "in a bearhug" by two white men driving a silver car at around 8.25am on Wednesday morning. 

She was found knocking on doors nearly four hours later, more than a mile away from where she was grabbed in Summertown.

Please read & share the descriptions of the offenders who abducted & raped a teenage girl in Oxford. https://t.co/fgBmQccurQ

— Thames Valley Police (@ThamesVP) October 1, 2016

Det Supt Chris Ward, Head of Thames Valley Police Major Crime Unit, said: "The victim has now been able to provide more detailed descriptions of the two offenders which we are releasing today."

"The first offender is a man with shaven dark blonde hair and balding, but no facial hair. He is in his mid twenties, of medium build, with blue eyes and about 6ft. He was wearing a hooded top with one pocket on the front and no drawstrings or logo, and black trousers. He spoke with a northern accent.

"The second offender is a man with brown hair that was gelled. He is in his late teens or early twenties, clean shaven, with brown eyes. He was slightly smaller in build than the first offender."

"Please rest assured that we are carrying out a thorough investigation but we also need the help of the public to bring these offenders to justice."

He appealed for anyone who knows anyone who fits the descriptions to come forward. On Friday it was revealed the girl did not arrive at school and police were informed by the school and her mother at 8.45am that she was missing.

Det Supt Ward said officers received a "substantial" number of calls in the first 24 hours of their investigation and they were trying to piece together exactly what happened.