A three-alarm fire destroyed the home of millionaire industrialist Edgar Kaiser, including his art collection, authorities said.

At the height of the Christmas Day fire, about 40 firefighters were battling the blaze in the expensive Point Grey area of Vancouver near the University of British Columbia.

Kaiser, 45, and his family escaped unharmed, but a fire captain suffered minor injuries when part of a wall collapsed on him.

The cause of the fire was under investigation. Fire Chief Bob Babcock said Kaiser, a house guest and the staff fled without injury when the guest saw a Christmas tree had caught fire.

Neighbors, who said the house was about 2 months old, quoted Kaiser as saying, "The art collection is all gone. I just want to be left alone."

Antique and specialty cars in an underground concrete garage escaped damage, and a Lamborghini and a Porsche were moved to a neighbor's house to avoid damage as the flames spread, fire officials said.

Kaiser is the grandson of the late U.S. steel magnate Henry Kaiser. He heads Kaiser Resources Ltd. of Vancouver, a private company with holdings in raw materials, aerospace and electronics, real estate and financial services.

Kaiser, who became a Canadian citizen in 1981, is a former owner of the Denver Broncos of the National Football League. He sold the team in 1984 for a reported $70 million.