A gunman fatally shot four people in an Arizona community of the United States early Sunday, authorities said.

The gunman entered a home in Lake Havasu City of Arizona and started shooting people inside, according to a police report.

The gunman fled with two of his children in a truck after the shooting, the report said.

Those killed were the children's mother and three others. Two survived in the shooting, Lake Havasu police said.

The gunman had been fighting with his wife over custody of their young children, police said.

The suspect was found dead later Sunday in California of a self- inflicted gunshot wound, police said.

The two young children were found safe with their relatives.

Police identified the alleged gunman as Brian Diez, 26.