(Florence County, S.C.)(AP) – Authorities had to use a bullet-proof vehicle to rescue seven police officers in South Carolina who were shot by a man as they tried to serve a warrant.  Florence County Sheriff’s Maj. Mike Nunn said three deputies were shot around 4 p.m. Wednesday  by a man inside a home in an upscale Florence neighborhood.  Florence Police Chief Allen Heidler says four of his officers were then shot, one fatally, as they rushed to the scene to assist the deputies.  Heidler asked for prayers for the slain officer, calling one 30-year veteran the “bravest police officer I have ever known.”  Nunn says the man held children hostage during a two-hour standoff, but they weren’t harmed.  Authorities didn’t name the suspect or say why they were serving the warrant.