Will: Two men have been found dead upstairs.
If will is on the 6th floor of an office building, while the two men have been found dead on the 8th and 9th floor respectively, could I use "upstairs" then or would it be taken to mean the 7th floor?
If "upstairs" doesn't work, what else would be natural to say? Would this work:
Will: Two men have been found dead on the floors above us.