UPDATED at 10 a.m. Wednesday with more details from police.

ST. LOUIS — A teenage girl was shot dead Tuesday night in St. Louis.

Police estimate the unidentified girl was between 13 and 16 years old. She was found in the 2800 block of Franklin Avenue, and police say they don't know who she is.

The scene was in the city's Jeff-Vander-Lou neighborhood, near Martin Luther King Drive and Jefferson Avenue.

Firefighters and EMS were called to Franklin Avenue at 10:25 p.m. Tuesday for the report of a "person down." They found the girl suffering from what they thought was a gunshot wound. The EMS crew pronounced her dead at the scene.

Police said they don't know who killed her. Homicide detectives are handling the investigation.