The youngsters have been reported lacking late Friday afternoon after a vehicle received caught in Tonto Creek close to Tonto Basin, northeast of Phoenix, the Gila County Sheriff's Workplace mentioned in a press release.
Gila County Sheriff's Office said that the vehicle holding seven children and two adults was swept into a flooded creek close to the Tonto National Forest in Gila County on Friday.
Authorities say the children found dead Saturday were the son and the niece of the adults.
Adverse conditions included heavy scrub and slippery mud along the stream and ice water from the thaw, but authorities said they remained hopeful.to look for the missing girl, who was last seen wearing jeans and a purple jacket.
An intense winter storm is pummeling Arizona, leaving hundreds - including tourists at Grand Canyon Village - without power, covering highways with ice and forcing authorities to declare a state of emergency, The Hill reported.
Gila County sheriff's Lt. Virgil Dodd said a 5-year-old boy's body was found Saturday about 3 miles (4.8 kilometers) downstream and that the search continued for the other two missing children. The creek crossing was marked as closed when they attempted to cross.
"We have no information as to why they were trying to cross the creek", Dodd said.
Dodd said the unidentified family were not residents of the area. "We are concerned for the safety of those involved and the first responders", a press release from the Gila County Sheriff's Office said.
© Patrick Breen/The Republic A truck passes through part of Tonto Creek in Tonto Basin, Arizona on December 1, 2019.
Rescue personnel located the vehicle, described as a military-style truck, in the creek Friday night about 600 to 1,000 yards away from the crossing.
Arizona has been hit with powerful storms this weekend.