All live poultry markets in New York City and some of its suburbs were ordered Friday to close for a week after the detection of seven cases of avian flu, which has also hit farms nationwide, led to the slaughter of millions of birds and driven up egg prices.

As a precaution, over the last two weeks, we have moved vulnerable bird species to protected areas in our parks,” officials said in a statement. On Friday, state officials ordered bird markets in the metropolitan area to close for a week after seven cases of avian flu were detected during routine inspections in the Bronx,

The nationwide bird flu outbreak has hit two New York City zoos amid growing concern about the virus dangers and a sharp rise in egg prices. NBC News' Shaquille Brewster reports.