My grandmother just passed away last week. It has always been said that she has a will and now all of a sudden

My grandmother passed away last week. It has always been said that she has a will. Now all of a sudden, it's being said that she doesn't. Where could we look to find a copy of the will? My cousins and I are looking because it is said that are mothers(who are now deceased) are still mentioned in the will. If there is a will and they are mentiond since we are their children are we entitled to their part?