Authorities in Iowa investigate the fatal shootings of six people believed to have been killed by a family member who later died by suicide after being confronted by police. Sources report that police respond to initial reports of gunfire in Muscatine, an eastern Iowa city. Upon arrival, officers find four victims shot to death inside a residence. Police then report that two additional victims are found elsewhere, with overall deaths totaling six. Multiple outlets describe the case as domestic-related, citing preliminary indications that the shootings stem from a dispute within the family. Authorities say the suspect, described as a relative of the victims, takes his own life when confronted by law enforcement, including during contact with officers at the scene. The investigation remains ongoing, with authorities continuing to determine the circumstances leading to the shootings and to confirm details about how and where the victims were killed.