Two fires were reported at the same apartment complex in less than 24 hours, KPRC Local 2 reported.
The first fire broke out at the Shadowtree Apartments on the West Sam Houston Tollway near Greenfork Drive at about 10:30 a.m. on Tuesday.
Fire officials said one unit was damaged in the first fire.
Firefighters responded to a second fire at the complex at about 3:30 a.m. on Wednesday.
Four units were destroyed in the second fire. Three of those unit were vacant.
Fire officials said the blazes were suspicious.
"Accidents of two fires, in one building, in one day don't always happen," Deputy Chief Terry Stone said. "We have arson units on the way."
No injuries were reported in either fire.
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