Updated 2pm - Added medical condition
Two construction workers fell nine metres down a shaft in Mrieħel this morning, police said.
The emergency on Triq is-Sebħ was called in at 10.30am, with an ambulance rushing the two men, both Syrians aged 27 and 23 respectively, to Mater Dei Hospital.
Police later said that one of the men was grievously injured in the fall, with the other suffering minor injuries.
Investigations are ongoing.