Four fires reported within 40 minutes of eachother were unrelated, fire officials said.
Multiple fires broke out in the La Puente area Thursday afternoon, prompting sheriff's officials to question whether the blazes were ignited on purpose.
Fire officials reported there was no immediate signs of arson, and an investigation by sheriff's from the Industry Department confirmed the same.
The first fire broke out in the residential 1300 block of North Indian Avenue in Valinda shortly after 2 p.m.
Another blaze engulfed part of a backyard in the 400 block of North Cadbrook Drive in La Puente, starting in some backyard brush and extending to trees.
The fires were reported within 20 minutes of each other, fire officials said. The homes are about 2 miles apart.
Blazes were also reported in the 15000 blocks of both East Temple Avenue and Beckner Street, fire officials said. They were called in at 2:45 p.m. and 2:46 p.m. respectively.
All of the blazes were either extinguished or close to it by 3:45 p.m., fire officials said. They were all outdoor fires and did not extend damage into structures.