Four more teenagers charged over stabbing at Ellenbrook Secondary College

A 10th teenager has been charged over a stabbing at a Perth high school that sent a student to hospital with arm injuries and put the college in lockdown.

WA Police said on Wednesday afternoon a 14-year-old boy would face five charges over Monday's melee, including unlawful wounding, being armed in a way to cause fear and carrying a prohibited weapon.

He is the 10th teenager to be charged over the incident, and is due to appear in court tomorrow.

Earlier today the Perth Children's Court heard a 15-year-old had been sitting on a bench at Ellenbrook Secondary College in Perth's north-east when he was approached by a gang of teenagers armed with knives and an axe in a premeditated ambush that left him in hospital with stab wounds.

The college went into lockdown at the time of the attack, which took place around the time the bell sounded for the end of classes.

Online abuse trigger

Three of the teenagers faced the Perth Children's Court earlier on Wednesday, which heard the assault was a result of "online abuse" between two gangs of youths from different sides of the Swan River.

The offending gang, said to be called "Southside", took a train to Ellenbrook to carry out the attack, the court heard.

The state prosecutor told the court the group, armed with knives and an axe, chased the 15-year-old victim at the school, and in the fracas he was stabbed in the arm and hit on the back of his head.

He was taken to hospital with non-life threatening injuries.

A witness told the ABC they saw a group of boys enter the school grounds on Monday in ski masks and carrying weapons.

The alleged attack happened outside the school's main building after the final bell about 3pm.

On Wednesday morning, police confirmed they had charged two 14-year-olds and a 16-year-old with four offences.

'Zero to 100'

The 14-year-old was the first of the three to appear in Perth Children's Court on Wednesday, where he was granted bail.

The court heard the boy was arrested on Tuesday afternoon.

"This is his first time in custody, I think it's a bit of a shock to him," the duty lawyer told court.

Magistrate Kyle Martin said the accused found himself in a "difficult situation", being before the court for the first time.

"He's gone from zero to 100 … these are disturbing allegations," Magistrate Martin said.

The prosecutor read an account from a witness describing the boy and his co-accused approaching the victim, who was sitting on a bench around 3pm on Monday.

The court heard someone from the group shouted, "Oi that's them", after which the 14-year-old and his co-accused took out knives and an axe from their bags.

The victim then tried to run but was cornered between a road and a footpath, the prosecution said.

The 14-year-old then allegedly swung a knife at the accused "multiple times", leading to a one-centimetre cut to the victim's arm, while another co-accused struck the victim over the head with a baton, resulting in a centimetre-long cut to his head, the court heard.

The accused then ran away and put clothing in a bin at a train station, the court heard.

The boy was granted conditional bail, and is subject to a 24-hour curfew. He is not allowed within 100 metres of Ellenbrook Secondary College and is forbidden from contacting the co-accused or the victim.

His parents were in court for the hearing. 

Another 14-year-old appeared in court on Wednesday, but no decision was made on his bail and he will remain in custody until a hearing next week.

A third child, aged 16, was granted conditional bail.

The prosecution said he was accompanied by 11 others on the day of the alleged attack, and the group dispersed after the incident.

The boy's mother was seen wiping her eyes with a tissue. 

All three boys are due back in court on December 17.