One man has been taken to hospital by ambulance after he was assaulted at a building in the street.
He is said to be seriously ill in the Royal Victoria Hospita;.
Two men have arrested in relation to this incident under the Offences Against the Persons Act 1861.
They have been taken to the PACE custody suite at Musgrave PSNI station for questioning.
Enquiries are at an early stage and the area around the building remains cordoned off tonight.
There are no further details at this time.