Kingscliff High School was forced into lockdown on Thursday after two teenage girls were arrested accused of repeatedly assaulting another female student.
Tweed-Byron police say they were called to the school around 11.30am after reports of the 13 and 16-year-old students confronting another student and a teacher at the high school.
Police allege the girls tried to entice a 14-year-old girl to fight before the teacher intervened and removed them from the classroom.
Later in the day the two girls approached the same student and once again tried to get her to participate in a fight.
While the 14-year-old girl was walking to the office with a teacher they were both allegedly assaulted with the girl being struck on the head a number of times.
A female teacher was also knocked over during the incident before other teachers came to their aid and restrained the two girls.
Police were contacted and the school was placed in lockdown for an hour while investigations were conducted.
The two girls were arrested and taken to Tweed Heads police station where the younger girl was issued a caution and the 16-year-old girl was charged with common assault and intimidation offences and will appear in a Children’s Court on Monday 24 March.
Both girls were also served with apprehended violence orders.