Horrified hotel guests were unwittingly sleeping in a room with a dead body for a week and only discovered the chilling truth when they noticed a rank smell coming from under the bed.
The guests were then stunned to find a woman's body wrapped in black plastic stashed under one of the beds.
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Investigators believe the body may have been laying there undiscovered for at least a week.
Clinic staff said that after the last guest checked out of the Hotel Senador in Mexico City, they had noticed a strange smell coming from under the bed, and decided to lift it to see what it was.
It was then that the staff at the hotel which is located in Doctores Neighbourhood, one of the capital's picturesque areas, just south-west of the historic city centre, discovered the plastic wrapped female corpse.
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Two cleaning ladies initially reported the grisly find from room 323 to management who immediately called police.
Medics who were the first at the scene could only confirm that the woman was dead and was aged between 25 and 30. A coroner's report later confirmed that she had died from suffocation.
A hotel spokesman confirmed: "During the time that we believe the woman was under the bed, several people checked into the room and slept with the body underneath the bed."
The hotel staff confirmed that the woman had arrived to use the room together with a male companion, but there is no CCTV footage available of either of them.
So far the identity of both the woman and her male companion remain a mystery.