A 43-year-old man is in a critical condition after falling a height of five courses in Triq il-Grigal, Senglea.
The man was carrying out plastering works on a washroom and was found lying on the floor of the roof suffering from a head wound.
He was assisted by a doctor from the Paola Health Centre and then taken to Mater Dei Hospital.
The man is a resident of Żebbuġ.