The blaze broke out at about 2:54 a.m. Saturday at the two-story brick rowhouse on the 1900 block of Lakeview Road.



Chionchio said Fana-Ruiz was arrested early Thursday without incident by the State Fire Marshal's Office and the Wilmington Police Department. She is in custody.



According to court documents obtained by the Wilmington News Journal and posted on its website, Fana-Ruiz told agents with the federal Bureau of Alcohol, Tobacco, Firearms and Explosives in an interview Wednesday that she had been angry and had gone into the basement of the house, started a fire, then fled from the basement.



Investigators with the ATF and the Delaware State Fire Marshal's Office determined Fana-Ruiz intentionally set the fire by igniting flammable or combustible material with an open flame, causing about $200,000 in damages to the home, court documents said.



Seven people were in the house at the time. Chionchio declined to specify who was in the house at the time.