Damage to the power grid caused by falling rocks in a service tunnel has resulted in the air conditioning at Mater Dei Hospital being cut off, the hospital said on its Facebook page this evening.

Enemalta, in turn, warned on its Facebook page that there may be short power interruptions while repairs are made but every effort will be made to limit inconvenience.

The cause of the outage was debris collapsed into a power distribution tunnel in Tal-Qroqq earlier on Thursday, causing considerable damage to the distribution system.

Several stones fell within the tunnel as a result of works on a site at the University of Malta in Tal-Qroqq.

“This damage has affected connectivity between Mosta and Kappara distribution centres and other links supplying the Sta Venera area,” Enemalta said.

Thanks to automated systems and controls, the damage had minimal impact on the power supply, the company stated, but warned that there may be short power interruptions while repairs are made but every effort will be made to limit inconvenience.

A magisterial inquiry into the rock fall is underway.