A man taken into custody Tuesday in connection with a firebombing at the campaign office of U.S. Rep. Russ Carnahan has been released. Police said Wednesday that the suspect, 50, whose name was not made public, was let go after the prosecutor's office took the case "under advisement" for possible charges later. Police can only hold a suspect for up to 24 hours without formal charges. The fire at Carnahan's campaign headquarters on Chippewa Street began about 2:20 a.m. Tuesday. A flaming projectile was apparently thrown through a back window, causing minor damage — mostly charred paperwork — in a room the campaign uses for its finance operation. While Carnahan is locked in a tough re-election battle, police offered no indication that politics could be a motive. Carnahan's Republican opponent, Ed Martin, issued a statement condemning the attack.