Police say three people were shot to death and four others injured on Sunday at a spa in a Milwaukee, Wisconsin suburb.

Local authorities say the shooting took place at Azana Salon and Spa in Brookfield, and the injured are now receiving medical treatment.

Police also say they believe the suspect, a man in his 40s, killed himself with a single gunshot to the head at the spa.

Police are questioning witnesses, who believe the gunman was targeting one of the spa’s employees.