Two men have been charged with multiple offences, including a Lurnea man, after a 50-year-old man was allegedly stabbed in the back and arm on Sydney's lower north shore on Wednesday night.
NSW Police said the man was walking along Spencer Street in Mosman at 10.40pm when he was allegedly set upon by a group of knife-wielding men.
The victim was treated by NSW Ambulance paramedics before being taken to Royal North Shore Hospital with injuries which are not considered life-threatening.
Police stopped a car on Miller Street in North Sydney about 12.35am on Thursday and arrested four men, aged between 23 and 30.
The men were taken to North Sydney and Chatswood police stations.
Two of the men were charged on Thursday afternoon.
A 30-year-old Lurnea man was charged with two counts of robbery armed with an offensive weapon causing wounding or grievous bodily harm, robbery with an offensive weapon and assault with intent to rob while in company causing wounding or grievous bodily harm.
A 23-year-old man was charged with assault with intent to rob while in company, causing wounding or grievous bodily harm and robbery armed with an offensive weapon.
Both men were refused bail and are due to appear at Manly Local Court today.
Police are also continuing their inquiries into three other armed robberies on the lower north shore over the past three days.
A 15-year-old boy was allegedly approached by a knife-wielding man near North Sydney train station at 11.15pm on Monday.
The boy was allegedly stabbed and robbed of his phone and wallet.
About half an hour later, a 28-year-old man was allegedly threatened by two men on Bay Street in Waverton. One of the men was allegedly armed with two knives.
The two men allegedly stole his wallet, phone, iPod and shoes and left him with cuts to his legs.
Both victims were taken to Royal North Shore Hospital.
About 10.45pm on Tuesday, a 28-year-old man was walking in Wollstonecraft when he was allegedly approached by three men, one of whom threatened him with a knife.
The men allegedly stole his wallet, phone, watch, laptop and headphones but left him uninjured.
Anyone with information about the attacks can contact Crime Stoppers.