Nearly 48 hours after two officers were shot in racially charged Ferguson, Missouri, investigators had dozens of leads but no arrests to report on Friday in the hunt for a gunman who turned a late-night protest against police into bedlam.

St. Louis County Police Chief Jon Belmar said authorities had ¡°a pretty good idea¡± where the gunshots that wounded the officers had originated, without providing any specifics.

The kind of gun used, the shooter¡¯s motivation and any connection to the protesters remained a mystery, prolonging uncertainty for a town that has come to symbolize America¡¯s struggle with race relations and policing.