SANFORD, Fla. (AP) - After declaring victories in getting federal and state officials to investigate the case of an unarmed black teenager shot to death by a Florida neighborhood watch captain, civil rights leaders continue to pressure authorities to make an arrest.

At a town hall meeting Tuesday evening in Sanford, where the fatal shooting of 17-year-old Trayvon Martin took place last month, officials from the NAACP, the American Civil Liberties Union and the Nation of Islam urged residents to remain calm but demand that the shooter, George Zimmerman, be arrested.

Zimmerman has not been charged in the Feb. 26 shooting and has said he shot Martin, who was returning to a gated community after buying candy, in self-defense after Martin attacked him. Police said Zimmerman is white; his family says he's Hispanic.