Ogden fire investigators were looking into the causes of three early Monday morning blazes, one in a large construction debris container, another in a vacant duplex and a third in a field.
Deputy Fire Chief Eric Bauman said one fire, near 2358 Quincy Ave., was reported at 3:38 a.m. Monday and could have spread to an adjacent structure had his crews not quickly responded.
The trash receptacle was fully engulfed in flames upon arrival of firefighters.
Two hours earlier, Ogden crews also rushed to the scene of a structure fire in an empty duplex at 2705 D Ave.
Bauman said firefighters saw flames billowing out of a downstairs window when they arrived at 1:30 a.m. The fire was out 20 minutes later after causing an estimated $20,000 in damage.
About 5:30 a.m., a fire in a field near Park and Monroe boulevards burned 3 acres.
No injuries were reported in any of the blazes.
Ogden has had nearly a dozen suspected arson fires this month.
Bauman asked that anyone with information about the fires call the Ogden Fire Department at 801-395-8221.