A 12-year-old Oro Valley boy burned in a house fire Wednesday morning was rescued by landscapers who heard him banging on a window, authorities said.

The boy, who was home alone, received injuries that were not life-threatening, authorities said. He suffered smoke inhalation and burns to his arms and chest and was taken by helicopter to the University of Arizona Medical Center. His condition was not released.

Landscapers working across the street from the home in the 400 block of West Klinger Canyon Drive heard the boy banging on a picture window, and went to the boy’s rescue, said Lt. Kara Riley,  an Oro Valley Police Department spokeswoman. The neighborhood is near North Rancho Vistoso Boulevard and West Moore Road.

The landscapers broke the window with a shovel and pulled the boy out, police Sgt. Carmen Trevizo said. 

“They are the true heroes,” Riley said.

When firefighters arrived they found smoke and flames coming from the front of the home, said Capt. Josh Hurguy,  spokesman for the Golder Ranch Fire District. Firefighters “made an aggressive interior attack, quickly knocking down the fire after the roof was opened for ventilation,” Hurguy said.

The fire was isolated to the living room, but the cause and damage estimate were not yet known. The fire may have blocked the boy’s access from the living room to the front door, he said.

Investigators from several agencies are working to determine the cause.