MINNEAPOLIS (AP) - The father of five children who died in a north Minneapolis duplex fire on Valentine's Day says he used the oven and a space heater to compensate for broken radiators in the unit.

Troy Lewis said Wednesday that several of the electric baseboard heaters on the second and third floor of the duplex didn't work, including the ones in his children's bedrooms.

Lewis says he repeatedly complained to his landlord, but the radiators were never fixed.

Landlord Paul Bertelson says Lewis never raised any concerns about the heat.

Bertelson says a licensed electrician installed the heaters in 2009. A city inspection last year found no problems with the apartment's heating system.

Investigators have been unable to pinpoint the cause of the blaze.

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