According to the police, the man fell "a few floors" and was injured in the case.
He is said to have been awake, but not talkable, and was taken to hospital by ambulance.
Exactly how the case happened is not known, but according to the police, there is reason to believe that crime is behind the incident.
Witnesses are said to have seen several people running from the scene.
A preliminary investigation into attempted murder or aggravated assault has been initiated.