Raging Fire That Killed 4 People At Tennis Star's Florida Home Was Intentionally Set (VIDEO)

The "unusual" fire at a Florida mansion belonging to a former tennis star was intentionally set, police said Wednesday.

As the scene was processed by investigators, the charred remains of two adults and two teenage children were discovered at James Blake's million dollar Tampa home, the Associated Press reported. However, the bodies have not been positively identified.

Hillsborough County Sheriff's Col. Donna Lusczynski described the fire as "unusual" and said there were "various fireworks" throughout the Tampa Bay-area home on Wednesday.

Two of the bodies appeared to have "upper body trauma," but she didn't indicate which ones or give any more details. Other than various fireworks throughout the residence, she said no weapons had been found.

The family of four had been renting the home from Blake for the past two years, Lusczynski said. He was not there at the time of the fire.

"Hours after the fire was reported about Wednesday 6 a.m. EDT, firefighters were still at the more than 6,000-square foot home located north of downtown Tampa," the AP reported.

"Blake bought the home in the Avila subdivision in 2005 for $1.5 million, according to Hillsborough County property records. It had five bedrooms and five bathrooms. Video of the fire showed it totally engulfed in flames."

Both the teenagers and the two adults were found in their respective bedrooms, Lusczynski said.

A former neighbor, George Connley, said Darrin Campbell was the treasurer of Carrollwood Day School, a private school attended by the Campbells' teenage children, Colin and Megan, ABC News reported.

"They were a very nice family. We know nothing of any problems," Connley said. "The kids were outstanding children. This is very difficult to put our arms around."

Known for its mansions and heavy security, Avila is an exclusive enclave. Over the years, various football, baseball and tennis players, including well-known athletes, have bought homes in the subdivision, which has a country club and golf course.

Blake, 34, was ranked fourth on the ATP world tour in 2006 before he retired last year. He also has the James Blake Foundation, an organization dedicated to cancer research, in memory of his father who died of gastric cancer, according to the AP.

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