Updated 12.30pm
A 31-year-old man was grievously injured when falling off a roof in Mrieħel.
The police said the Cospicua man was working on a roof in Triq in-Negozju when he fell some three storeys onto another roof at around 8am.
Civil Protection Department officials and medics rushed to the site to help the man.
His condition is not yet known.
According to the Occupational Health and Safety Authority, he was carrying out membrane work.
The authority said in a statement it had kicked off an investigation into what caused the accident.