A 34-year-old man who lives in Swieqi was injured in a fall at Fomm ir-Riħ late on Wednesday.
The police said the man fell in an inaccessible spot while walking and the Civil Protection Department had to be called in to help rescue him.
Emergency doctor Michael Spiteri said the rescue operation was "long and difficult".
The rescue operation lasted from around 7pm to 11pm.
The victim was then given first aid by a medical team on site and then transferred to Mater Dei Hospital by ambulance.
His condition is not yet known.
Spiteri paid tribute to the teams working together on site, saying they operated in "pure symphony".