Two teenage boys will remain behind bars after being charged with the murder of Queanbeyan service station worker Zeeshan Akbar.

The suspects, aged 15 and 16, were arrested on Friday after an alleged crime spree and police pursuit from New South Wales into the ACT.

The body of 29-year-old attendant Zeeshan Akbar was found by a fellow employee at a Caltex service station on Bungendore Road, Queanbeyan, just before midnight on Thursday.

The boys have each been charged with murder, robbery, wounding with intent to cause grievous bodily harm, aggravated entering of a dwelling with intent and aggravated car theft.

The older teen faces an additional charge of assault occasioning actual bodily harm.

The teenagers faced an extradition hearing at the ACT Children's Court today.

One of the suspects' mother was also at court.

They did not apply for bail while appearing via video link at the Parramatta Children's Court this morning.

Bail was formally refused by the magistrate ahead of their next court appearance in the same court on Tuesday.

Police earlier said "physical evidence" found at the scene of the stabbing led them to believe it may have been an act of terrorism and they were investigating the 16-year-old for possible terror links.

No terror related charges have been laid.

The pair faced the ACT Children's Court in Canberra yesterday and were promptly extradited to NSW.

Meanwhile, the mother of one of the two teenage boys has declared her son "is not a terrorist".

"No one knows the truth," she said.

In addition to the fatal stabbing, police are investigating the pair’s alleged involvement in a number of incidents in Queanbeyan and the ACT on Thursday night and early Friday morning including an attempted robbery at a bottle shop in the ACT, an attack on a homeless man and an assault at a unit in Queanbeyan, and later an attack where a man was stabbed and his vehicle stolen.

Zeeshan Akbar was studying and working to send money home to his family. (Supplied)

Police said they attempted to pull over a silver Ford sedan about 6.35am Friday in NSW, but the driver allegedly fled, leading to a police pursuit before the vehicle crossed the border into the ACT.

The pair were later arrested on the Monaro Highway without incident. A weapon was allegedly found inside the vehicle.

Akbar, the eldest of four children born in Pakistan, was studying and working at the service station to send money back to his family.

His only relative in Australia, Ifran Khan, told 9NEWS he was "a friendly person to everyone".

"It's such a big loss," he said.