A firebomb killed a handicapped grandmother, her daughter and three children living in a blighted neighborhood of crack houses and abandoned buildings Friday.
Police said they have no suspects but believe the attack on the three-story rowhouse may have been drug-related.
"Whatever the dispute, whatever the nature, the people inside were innocent," police Inspector Jerrold Kane said. "We have no indication that the family was involved in anything at all. They did nothing."
The grandmother's husband and a son survived the early-morning attack after a neighbor persuaded them to jump from a second-story window.
Kenneth Jones, 34, and William Jones, 76, landed on the sidewalk. The younger man kicked in the front door, only to be thrown backward by the fire, said neighbor Keith Crawford.
Killed were Kathleen Jones, a 68-year-old grandmother found in her wheelchair; her 23-year-old daughter, Paulette; Paulette's two children, ages 2 and 6; and their 14-year-old cousin Tawanda Jones.
William Jones escaped with only minor injuries. Kenneth Jones was critically burned.