An electrical substation exploded early on Tuesday in Bulgaria's Black Sea city of Burgas, damaging several apartments in a residential building, but leading to no casualties.

A team of municipal experts is to inspect the affected building, Burgas Mayor Dimitar Nikolov has told local media. He said that the EVN power distribution company was responsible for the accident.

EVN employees replaced a safety fuse in the substation around 1:11 am, as EVN had received a call from local residents that smoke was coming out of the substation.

The substation exploded soon after the employees left. The blast slightly injured two children and their father. Many residents of the affected building had already left it, presumably saving their lives, according to local media.

Several nearby shops have been completely destroyed, according to Darik radio.

EVN Bulgaria communication department head Petar Kostadinov has told the Bulgarian National Radio that the accident was "extremely unusual."

EVN has promised to compensate the citizens whose apartments were severely damaged in the explosion.

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