You need as quickly as possible to clear their range from forced their way into the zombies, otherwise they would flood the whole city, and you will have no chance to survive. The matter is complicated by the fact that now it was night, and they are well hidden in the dark. Be careful, because with every dark corner at any time to whip out a hungry beast, and you try to break into small pieces. Always be on the alert, and do not forget to follow, how many bullets in your store.