Police in Papua New Guinea are concerned schools aren't dealing with a culture of violence after being called in to stop a mass brawl involving high school students.
The Western Highlands provincial police commander, Kaiglo Ambane, says a fight over the weekend involved about 100 students from Fatima Secondary school, who used stones and bush knives.
He says many students were injured and some suffered serious stab wounds resulting in hospitalisation.
Mr Ambane says police want schools to prevent this type of violence, describing the fight as the continuation of an argument caused by the theft of a mobile phone in May.
"We are concerned about that. The school administration should take action and all. Even if its to immediately suspend the students or do something about it so that such things should not go out to other schools or involve other people. The students involved must be disciplined immediately."
Kaiglo Ambane says police are yet to lay charges.
Other schools have also asked police to help deal with violence and destruction of property.