spooky dude!.. what type of items where they? Are they light items that can easily be moved by wind?
lol.. really spooky. I personally don't believe in ghosts (because I have not had any weird experiences and if I have I probably just brushed it off and did not entertain the possibility of a ghost).
If I were you I wouldn't acknowledge their presence cuz if you do they may harass you more.. if you ignore them maybe they'll go away.