Sources said a white male in his 20s or 30s opened fire inside a mall in Wauwatosa, Wis around 2:50pm Friday injuring seven adults and one teen.
Police said they believed the shooting had not been a random act of violence but the outcome of an altercation without providing additional information on the ongoing case. The suspect remains at large.
Reports said local FBI units were assisting with the investigation.
The mall where the shooting took place released a statement on the incident: "We are disheartened and angered that our guests and tenants were subject to this violent incident today. We are thankful for our partners at the Wauwatosa Police Department and we are cooperating with them as their investigation develops," it read.