A Florida man charged with shooting at George Zimmerman last week had "a fixation" on the former neighbourhood watch leader and had recently been admitted to a mental institution, according to a police report made public Tuesday.

Police in central Florida say they've arrested a man who shot at George Zimmerman during a confrontation earlier this week.

Police officers recovered a handgun from George Zimmerman and took two guns from a man accused of shooting at the former neighbourhood watchman while both were driving, authorities said Tuesday.