Scant details so far. Via the Orlando Sentinel:
George Zimmerman has been arrested and was en route to the Seminole County Jail, according to Sheriff Don Eslinger. It’s not clear what happened or what crime he’s accused of committing, but just before 1:30 p.m., Eslinger confirmed that Zimmerman had been arrested today and was being driven to the county jail in Sanford. He said more information would be available shortly. WESH-Channel 2 reported that Zimmerman was accused of domestic violence by a girlfriend. The Sheriff’s Office, in a short news release, reported that the agency had arrested Zimmerman after being called to a disturbance on Topfield Court in western Seminole County near Apopka. Zimmerman’s new girlfriend lives in that part of the county.
UPDATE: Zimmerman has been charged with felony aggravated assault, domestic violence battery, and criminal mischief.