A bomb squad has been called to the Babel nightclub in the centre of Malmö.
Police chief officer Magnus Lefèvre said: “There has been some blow on the club, but we do not know what has been detonated.
“The bomb group and technicians are on your way to investigating it.”
No reports of casualties have emerged so far – the club was reportedly closed during the time of the explosion.
It is currently unclear caused the blast or if there was a motive behind the explosion.
According to a Swedish news outlet, Sydsvenskan, a man was seen driving away on a moped shortly before the explosion.
The outlet also reports that people were woken up at 12.30am UTC (11.30pm GMT) after the blast.
One witness said: “I was awakened by a big crowd.”
“It was a terrible bang.”
The nightclub located in Malmö is the latest in a series of bombs and threats that have plagued the country.
The same club was caught in a powerful explosion last month that shattered windows on the first floor with a car that was parked outside also being damaged.
More to follow…