Story highlights Technology executive Don Pyle owned the house

The fire destroyed the 16,000-square-foot mansion, a fire official said

(CNN) A technology executive and five other people are feared dead after a suspicious fire destroyed a mansion in Annapolis, Maryland.

The house belonged to technology executive Don Pyle, the chief operating officer for ScienceLogic, company spokesman Antonio Piraino said.

Pyle had not been heard from on Monday, and his colleagues at ScienceLogic were "hoping for a miracle," CNN affiliate WJLA reported.

Pyle was believed to have been at home with his wife and four grandchildren.

When the first firefighters arrived on the scene, they received conflicting reports about whether the family may have been out of town. But after interviews with relatives, "it has been determined that six members of the family are not accounted for," the Anne Arundel County Fire Department said.

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