West Virginia ? Investigators on Monday found the body of a ninth victim in the charred debris left from a fire at a five-story Huntington apartment building, authorities said.

With the discovery of the man’s remains, all of the building’s residents were accounted for in the city’s worst fire in nearly 50 years, authorities said.

Officials said it could take days to identify the cause of the fire, which was reported about 11 p.m. Saturday. Officials said it began in a second-floor unit, shooting flames and smoke up utility access channels to the upper floors. Twenty-four people were rescued, Fire Chief Greg Fuller said.

Two people remained in serious condition Monday and a third was released, hospital spokeswoman Kathy Cosco said.

The dead include a 7-year-old boy and his mother, three siblings ages 14, 17 and 19, and a 68-year-old woman.