India, Sept. 12 -- A 15-year-old girl - a student of Class 10 - was allegedly attacked with a blade by four schoolgirls outside their school in northwest Delhi's Rohini, police said on Thursday.

The incident took place around 1pm on Tuesday when the girls waylaid the victim after school hours, according to investigators aware of the case details.

A video of the attack shows the accused slapping her, pulling her hair, and then slashing her face and back with a blade. Investigators said the victim sustained deep gashes on her face, back, and waist, requiring more than 20 stitches.

According to police, the assault stemmed from a fight five days earlier "over a male friend," during which the victim allegedly abused one of the accused. Seek...