Two Croydon teenagers out celebrating a birthday were gang-raped in a town centre car park on Saturday.

One of the girls had been celebrating her eighteenth birthday in a Croydon club on Friday night and was walking with her friend along Surrey Street, when she was approached by four men at 1.30am.

The men, who were not known by the girls, walked with the teenagers to Scarbrook Road before forcing them into a private car park where each of the men took turns to rape them.

Detective Constable Paul Fitzgerald said: "The men raped both girls and the girls have been left so traumatised we have not yet been able to take full statements from them.

"This is a terrible ordeal for anyone to go through and because of the nature of the offence we need to make arrests as soon as possible.

"At this stage we are looking through CCTV footage and interviewing witnesses.

"We are appealing for anyone, particularly clubbers in the area at that time, who may have seen four men talking to two girls to contact us."

The rapists are described as four black men between the ages of 18 and 25.

The girls, who used a mobile to raise the alarm, were taken to a specialist police medical unit where they were examined for forensic evidence and offered counselling.

Witnesses can call the specialist sexual offence unit, the Sapphire Unit on 020 8768 1212 or call Crimestoppers anonymously on 0800 555 111.

Police are still looking for a gang of men who tried to abduct three 19-year-old women earlier this month.

The men tried to force the women into a car, near Thornton Heath pond at around 3pm on August 2.

Another woman was the victim of an attempted rape, also on August 2, but escaped her attacker by biting him on the hand when she was approached in Dingwall Road at 11.40pm.