An 18 year old male was stabbed in the back in the vicinity of the bonfire and was taken to hospital where his condition this morning is understood to be critical.
Another male, who is 39 years old, also sustained a stab wounds to his arm and hip.
He is also in hospital receiving treatment however his injuries are not thought to be life threatening at present.
The detained suspects, 28 and 21, were arrested early this morning at an address off the Oldpark Road on suspicion of offences including causing grievous bodily harm with intent.
Chief Inspector Kelly Moore said “We are aware of footage circulating on social media and this will be examined as part of the wider investigation.
“I would encourage anyone who was in the area and who can assist the investigation to please make contact with us by calling 101, quoting reference 1818 08/08/19.”
Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.