Police near Tampa believe a fire was intentionally set at a mansion owned by retired U.S. tennis star James Blake. In the video above, you can hear a 911 call from the scene, as a woman walking her dog saw the mansion explode Wednesday morning.

According to an AP report, the bodies of two adults and two teenagers were found inside the home. Blake was renting the home to a family. The identities of the victims have not been confirmed, but authorities said Darrin Campbell and his wife, Kimberly, were unaccounted for.

Police said no weapons had been found at the home and that murder-suicide was a possibility.

Read more from AP below, and watch a live report from the scene from Fox and Friends this morning.

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

"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."

He said that Kimberly Campbell was "sophisticated and classy."

The fire at the more-than-6,000-square-foot home north of downtown Tampa was reported about 6 a.m. Wednesday. 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 engulfed in flames.

Avila is an exclusive enclave known for its mansions and heavy security. Many well-known athletes call the community home and over the years, various football, baseball and tennis players 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. 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.

Blake's agent, Carlos Fleming, told The Associated Press that Blake was not in Florida. He declined to comment further.