A man aged 32 was stabbed in the chest and a second man aged 52 required stitches to his scalp following the incident in Glasgow’s Possilpark area.
Police said a group of at least ten youths in their mid-to-late teens spilled out onto the road in Saracen Street at around 7pm on Friday.
Vehicles had to swerve to avoid members of the group, who later ran off.
The 32-year-old suffered damage to his lung and is in a stable condition at Glasgow Western Infirmary.
Detective Sergeant Alan Cuthbert said: “We are conducting door-to-door enquires and we have considerable CCTV footage to review. What we do understand at this stage is that these men have been assaulted without any sort of provocation. I am keen for anyone who observed the incident to come forward, particularly any drivers who would have observed the incident up close.”
Meanwhile, the death of a man in an unrelated street disturbance in Glasgow is being treated as murder.
John McFarlane, 28, died in hospital shortly after being found with serious injuries on Thursday night.
McFarlane, of Auchirnairn Road, Bishopbriggs, East Dunbartonshire, was found on the town’s Springfield Road at around 10.35pm. He was taken to Glasgow Royal Infirmary, where he died.