08/04/2017 7:26 AM AEST | Updated 08/04/2017 12:01 PM AEST

Two Teens To Face Extradition Hearing After Deadly Attack At Queanbeyan

Counter-terror police are investigating.

The Queanbeyan Caltex service station where a man was stabbed to death on Thursday. Photo by Karleen Minney.

Two teenagers will face an extradition hearing on Saturday after a deadly rampage across the NSW and the ACT.

During the 10-hour crime spree on Thursday night a service station worker was stabbed to death at Queanbeyan.

The teenagers have reportedly been charged with a string of offences including murder.

Police say physical evidence found at the scene indicates the attack may have been terror related, Channel Nine reports.

It has been reported that the letters "IS" were written in blood on the window of the service station.

Police have said that the pair were taken to a watch house in the ACT but authorities were issuing warrants and would seek their extradition back to NSW.

On Friday, NSW Police Force Deputy Commissioner Catherine Burn said investigators would examine the motivation behind the attack.

"I want to reassure the community that there is no ongoing threat in relation to this matter at this stage," Burn said.

"We have two teenagers in custody and sufficient information to believe the actions of one of those teenagers may be related to terrorism. That information comes from physical evidence at the scene and other sources.

"This investigation is in its infancy. We are also looking at number of other incidents involving an attempted robbery at a bottle shop in the ACT, an attack on a homeless man in Queanbeyan, an assault at a unit in Queanbeyan and later an attack where a man was stabbed and his vehicle stolen."