The man allegedly behind a triple-stabbing at a Sydney gym and later robbing two service stations at knifepoint is standing on top of a roof in a standoff with police.
Three men were stabbed at a fitness centre in Brookvale in the Northern Beaches about 8pm on Monday, before the alleged attacker fled in a stolen BMW.
The man is believed to have then carried out two armed robberies at service stations in Newcastle later that night, NSW Police said.
He has been standing on top of a roof in north-west suburb of Tighes Hill on Tuesday in a standoff with police, Nine News reports.
Three men were taken to Royal North Shore hospitalised after they were stabbed at a gym on Pittwater Road in Brookvale in Sydney's Northern Beaches
The man believed to be behind the triple-stabbing and two armed robberies is standing on a roof in northwest Newcastle in a standoff with police
Officers are reportedly at the scene negotiating with the man accused.
He had allegedly fled the gym in a stolen BMW and robbed two service stations in Newcastle.
The first occurred at Sandgate about 9.45pm when a man threatened a female worker, 38, with a knife and smashed the cash register.
He forced the register open and fled with the cash in the stolen BMW.
About 15 minutes later, at 10pm, a man walked into a second service station on Maitland Road and placed two chocolates on the counter.
Officers are reportedly at the scene negotiating with the man accused
A man stumbles to the ground in CCTV footage of the Brookvale stabbing
The alleged attacker fled the scene in a stolen BMW and has been connected to two armed robberies in Newcastle later on Monday night (scene at the gym pictured)
As the 24-year-old employee opened the till the man jumped onto the counter and produced a knife while demanding cash.
The employee complied and the man ran from the store and fled the service station with the stolen cash and car, police said.
Officers responding to the armed robbery saw the stolen vehicle leaving the service station and pursued; however it managed to evade police.
The man is described as Caucasian in appearance, about 168cm tall. He has a full beard and is aged in his mid to late twenties. He is described as wearing black shorts and a light coloured t-shirt.
The alleged attacker fled the scene in a stolen BMW (scene at the gym is pictured)
Emergency services are pictured at the scene in Brookvale after three men were stabbed shortly after 8pm on Monday
The gym on Pittwater Road in Brookvale, Sydney's Northern Beaches, is pictured on Monday night
No-one was injured during the robberies.
A crime scene was established at both service stations as police from Newcastle City conduct further inquiries.
The registration plate of the vehicle and description of the man matches that from the triple stabbing at the gym on Pittwater Road.
In that incident, he entered the gym 'agitated and aggressive' about 8pm and approached four men and a trainer.
The man allegedly punched one of the men before producing a knife and stabbing three of the men, who were all taken to Royal North Shore Hospital.
A distressed woman is pictured speaking on the phone at the scene of the stabbing
The man allegedly punched one of the men before producing a knife and stabbing three of the men (scene pictured)
One of the men was taken straight in for surgery. All three, aged 26, 29 and 31, are now in a stable condition
One of the men was taken straight in for surgery. All three, aged 26, 29 and 31, are now in a stable condition.
The trainer managed to escape injury.
Police are appealing for anyone who may see the vehicle, a black BMW with NSW registration DKK 39Q, or has any information that may assist the investigation, to contact either Newcastle City or Northern Beaches police.
Police are urging members of the public not to approach him, as he is believed to be armed with a knife, but to call triple zero immediately.