The girl was in Walthamstow between 12.15am and 12.30am on Saturday when she met three men, police said.
She was taken to a garage area at the end of Hibbert Road, near Theydon Street, where she was pinned down and raped by two of the men.
The girl managed to call a friend who came to the scene and they left together. The suspects then left the area.
More top news
The passenger rushing to catch a train at Ealing Broadway was headbutted after asking a man who was blocking his way to 'hurry up'.
The FBI is believed to have fitted a tiny microphone into a hotel key fob to spy on officials.
A modified version of the herpes virus has proved a major success in phase III clinical trials.