Boys admit fatally bashing Perth teen

Three teenagers have admitted fatally bashing a 16-year-old boy in Perth's north in 2013.

Quinn De Campe was found beaten and unconscious at a bush reserve in Balga in December. He died in hospital.

Three teenage boys were initially charged with grievous bodily harm but that was later upgraded to murder.

They, along with another boy, were also charged with stealing.

In the West Australian Children's Court on Monday, three of the boys pleaded guilty to unlawful killing - a plea bargain that was accepted by the prosecution.

All four admitted to stealing.