Swedish police received reports of an alleged assault in a residential apartment in Östermalm, Stockholm. According to the police notification, officers were contacted by phone about an ongoing incident at an address on Östermalm. Police are handling the case as an investigation into the reported violence. At this stage, no further details about injuries, suspects, or what led to the incident were provided in the information released. Anyone with relevant information is expected to contact police, as is standard in such matters. The case is currently described as a report of an ongoing assault in an apartment. Police may take additional steps as the investigation develops.