( CNN ) -- A man suspected in the shooting deaths of five people at a Lake Havasu City , Arizona , residence on Saturday night was found dead early Sunday of an apparent self-inflicted gunshot wound , according to police . The killings began just before midnight Saturday when police say 26-year-old Brian Diez entered the residence , shot six people and abducted two children from the home , according to a press release from the Lake Havasu City Police Department . Four of the victims were pronounced dead . Two others were transported to local hospitals , where one of them died of his injuries . According to an Amber Alert issued Sunday for the missing children , Diez , their father , was locked in a custody battle with their mother , identified by police as 23-year-old Deborah Langstaff . Langstaff was among the five people killed . A little more than three hours after the shootings , Lake Havasu police investigators discovered that Diez 's vehicle was parked at a home in Rancho Cucamonga , California , more than 250 miles away from the site of the killings . At about the same time , local sheriff 's deputies were dispatched to the same residence , responding to a report of a suicide . `` Deputies arrived and found Diez deceased of an apparent self-inflicted gun shot wound , '' police said in a statement . The two children , identified by police as 4-year-old Kaia Diez and 13-month-old Cole Diez , were found safe at the California home with family members . Police said the five people killed in Arizona were : Langstaff , Primo Verdone , 24 , Russell Nyland , 42 , Ashley Nyland , 20 , and Brock Kelson , 20 . Deborah Nyland , 44 , was transported to Sunrise Medical Center in Las Vegas , Nevada . Her condition was unknown Sunday night . The relationship between the victims was not immediately clear .
Police say Brian Diez , 26 , shot six people , killing five of them . He then drove to a nearby Walmart and killed himself with an AR-15 assault rifle. The children were found safe early Sunday .