The director of a Khon Kaen secondary school confirmed on Monday that several girls in Mathayom 3 had attacked a classmate during lunch break on July 10 over a Bt4,200 debt that had been only partially repaid.

A Khon Kaen school director and teachers are investigating a July 10 incident in which Mathayom 3 female students daringly attacked their classmate during a dispute over debt collection in a classroom.