The police were alerted on Monday morning about suspected gunfire against an apartment door in Fisksätra, Nacka.
No one has been physically injured, but an investigation into attempted murder and serious weapons offense has been initiated, the police write on their website. The area has been cordoned off for further investigation.
"The police's forensic technicians will conduct a technical examination to determine how many shots were fired and establish other details that can move the investigation forward," the police write.