The other samples containing the deadly H7N9 virus were collected from two marketplaces selling agricultural products in the down river Yangse delta, Shanghai. After gene sequence analysis, the national avian flu reference laboratory concluded that the strain of the H7N9 virus found on those 19 samples was highly congenetic with that found on a pigeon on Thursday. The ministry ordered Shanghai to shut down the marketplace and cull all (living poultry) chickens, ducks, geese and pigeons.