A 66-year-old man from Żebbuġ was grievously injured on Thursday after falling from a height of around one storey.
The police said the accident happened in the zone known as tal-Ħlas at 7.15am.
The man was working in a field when he lost his balance and fell on top of rubble.
He was assisted by members of the Civil Protection Department and taken to hospital by ambulance.
The police are investigating.