City fire inspector Guy Santone says he has also found no clear evidence of electrical or mechanical problems, but says more tests are needed to finally determine the cause of Sunday's fire.

Thirty-one-year-old Tyreesha Richardson, and 43-year-old Gwyneth Henry, died in the fire. The women had lived together for years in the upstairs apartment in a home. Their three children and a tenant in another apartment downstairs weren't home at the time.

Nobody has been charged in connection with the fire.

County detectives detailed Santone's findings in a search warrant. Santone found fuel vapors near a door and four steps leading to the apartment.

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Information from: Erie Times-News, http://www.goerie.com