A 61-year-old man was seriously injured when he fll a height of two storeys down a shaft on Saturday afternoon.
The police said on Sunday that they were alerted to the accident at 7.45pm.
The accident happened in Sqaq Tomna, San Ġwann. The man, a resident of Swieqi, had been working when the accident happened.
He was removed from the site by rescuers of the Civil Protection Department and hospitalised in a serious condition.
Woman falls down stairs
In a separate incident, a 43-year-old woman was seriously injured when she fell down stairs on Saturday afternoon, the police said.
The incident happened at 5pm in a house in Triq il-Mitħna, Rabat.
Magistrate Nadine Lia is holding an inquiry.