A mattress fire inside a rowhome in southwest Baltimore Friday night resulted in the death of a young girl, said to be between the ages of 3 and 4. Crews were called around 6 p.m. Friday to the 4700 block of Vancouver Road for a report of a fire, officials said. The cause of death will be determined by the medical examiner’s office. The death has been included in Baltimore’s homicide numbers, making the current total 88. This case is now being investigated by homicide detectives.