Two children suffered minor burns after a boat engine exploded about 65 miles northeast of Phoenix at Lake Apache, authorities said.
A 7-year-old girl was taken to a hospital for treatment after the explosion at around noon Sunday, Maricopa County sheriff's spokesman Joaquin Enriquez said.
The other child wasn't brought to a hospital.
No one else was injured.
Enriquez said authorities don't yet know what caused the explosion.
No other information on the explosion was immediately available at mid-day Sunday.
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