SAN JOSE -- A fire gutted a vacant home on the 1200 block of Lucretia Avenue shortly before 10 p.m. Thursday, and investigators are trying to determine what caused the blaze.

Fire crews arrived at the empty, fenced-off single-family home a few blocks south of Story Road and quickly went into defensive mode to make sure the blaze didn't spread, said San Jose fire Capt Mike Van Elgort. He said the home was surrounded by chain-link fence to keep out intruders, which made access difficult.

They had it contained to the structure within 20 minutes, but portions of the building were still smoldering an hour later.

Van Elgort said there were flames coming out of all sides of the home when they arrived, along with downed power lines on the property. He said they are trying to determine whether the wires sparked the blaze or if they dropped as a result of the fire.

Arson investigators have also been summoned to the scene, he said.

Nobody was hurt or displaced by the fire, Van Elgort said.

Contact Eric Kurhi at 408-920-5852. Follow him at Twitter.com/erickurhi.