It is unclear whether anyone was home at the time, but no one was injured, according to police.
“We have an ongoing operation at the scene. We are looking for a perpetrator,” police spokesman Robert Sennerdal tells TT.
A preliminary investigation into attempted murder has been opened.
The alarm was raised at 8 p.m. on Friday after a bang was heard in the area.
“Then we were able to see what we believe was a bullet hole in an apartment door,” Sennerdal says.
Any camera footage is being checked, and witnesses are being interviewed.
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