A teenager has been charged over a vicious attack on a schoolgirl in Logan.

The 12-year-old girl was allegedly approached on Thursday morning in a pedestrian tunnel at Kingston while she was walking to school.

It’s alleged she was slashed across the face up to 20 times with a box cutter but was able to fight off her attacker and flee.

Detectives have charged a 17yo boy over the “vicious and cowardly” attack on a 12yo girl south of #Brisbane where she was slashed across the face with a box cutter. @NewsTalk4BC @2GB873 #MRNnews

— Emily O’Brien (@EmilyC_OBrien) October 18, 2018

She was taken to Queensland Children’s Hospital (formerly Lady Cilento) with serious injuries and underwent surgery that same evening.

Police launched a major manhunt and a 17-year-old boy has been charged with acts intended to cause grievous bodily harm.

The alleged attacker is refusing to tell police what sparked the random attack.