A 78-year-old man from Żejtun was grievously injured in a Qormi stable while using a grinder.
The police said the incident took place at 1pm on Triq tal-Ħandaq.
He was given first aid on site and then rushed off to Mater Dei Hospital.
Earlier, a man was injured in a similar incident, while using a chaser, in Paola.
Police investigations are ongoing.