ruby-on-rails - How to delete status from Facebook page with using Rails?

Question

I am trying these gems: FbGraph and Koala, but with no success.

How I am trying to do it with Koala:

delete_it = Koala::Facebook::GraphAPI.new(data.facebook_access_token)
delete_it.delete_object(fb_post_id)

The result is

Koala::Facebook::ClientError in ...
type: GraphMethodException, code: 100, message: Unsupported delete request. [HTTP 400]

Thus, how to do that?

Thanks