Four people and three dogs are dead after a Florida mobile home was intentionally set on fire in what authorities called an “evil” act, according to the Hillsborough County Sheriff’s Office.

The sheriff’s office responded to a call of a fire at a residence in Plant City shortly after midnight on Wednesday.

Fire crews were able to knock down the fire in 20 minutes, though four people were found dead at the scene, authorities said. Three dogs were also killed in the blaze.