A seventh grader was stabbed to death by a sixth grader during a quarrel in their Bangkok school Friday noon, police said.

The fight took place inside the Yannawes Witthayakhom School on Sathu Pradit 8 in Sathorn district.

Police quoted the sixth grader, who surrendered after the incident, as saying that he stabbed the senior students in self-defence because he was being assaulted by several seventh graders.

He said the seventh graders assaulted him after he refused to pay them protection fee.

--The Nation/ANN