Several people witnessed the shots being fired at the building. No one was injured.
“Several people called in about the incident but I'm not sure what the witness hearings have resulted in,” Fredrik Nylén from Stockholm Police told news agency TT.
It is not clear if there are any known threats towards someone linked to the restaurant or anyone eating there.
“That's obviously something we're looking at. What reasons may be behind it,” Nylén said.
Police managed to locate empty bullets at the crime scene, and have launched an investigation into serious weapon crimes and attempted murder. No arrests have been made.