Another major norovirus outbreak forced Richmond’s overcrowded jail to quarantine hundreds of inmates. And the nasty stomach bug may also have hit doz- ens of students and staff members at three Henrico County schools.

The jail quarantine, imposed yesterday afternoon, affects 271 men in the jail’s G Building, said Richmond Sheriff’s Office spokeswoman Tara Dunlop. It will last until at least Friday, when the jail’s doctor will decide whether the outbreak has passed.

Henrico school officials said students and staff at Shady Grove Elementary School and Highland Springs and Deep Run high schools started showing signs of the illness this month. In Hanover County, officials report four confirmed cases of norovirus.

Norovirus causes vomiting, diarrhea and stomach cramps.

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