Two adults and two teenagers have been killed in a fire at a mansion owned by former US tennis star James Blake.
Police in Florida said the blaze – in Tampa’s exclusive Avila neighborhood where many sports stars and executives live – was intentionally set.
A Hillsborough County Sheriff official said Blake rented the home to the Campbell family.
Voter registration records identified them as Darrin Campbell and his wife, Kimberly, but investigators say they will not know the victims’ identities until autopsies are completed.
Officials said the Campbells are unaccounted for.
Colonel Donna Lusczynski said two adults and two teenagers were killed. Blake was not home at the time and is believed to live at his main home in Connecticut.
Ms Lusczynski said the scene was “unusual” and added there were “various fireworks” throughout the home.
Two victims suffered from upper-body trauma, but Ms Lusczynski did not indicate which. She also said no weapons had been found at the home and that murder-suicide was a possibility.
A former neighbour, George Connley, said Darrin Campbell was the treasurer of Carrollwood Day School, a private school attended by the couple’s teenage children, Colin and Megan.
“They were a very nice family, we know nothing of any problems,” he said. “The kids were outstanding children.
“This is very difficult to put our arms around.”
Blake, 34, was ranked fourth on the ATP world tour in 2006. He retired last year.