On Monday, U.S. researcher Nicholas Reeves joined a group of Egyptian and foreign archaeologists to examine the famed tomb of Tutankhamun, an 18th-Dynasty pharaoh who died around 1323 B.C. Egypt’s antiquities minister confirmed Reeves's new theory that evidence suggests the existence of two previously undiscovered rooms that were not known from Howard Carter's 1922 excavation.

Door-shaped lines indicate "that the western and northern walls of Tutankhamun’s tomb could hide two burial chambers,” minister Mamdouh Eldamaty told the Egyptian state press.

Reeves believes the tomb of the mysterious Queen Nefertiti could lie behind the walls.

Egyptian authorities will decide this November whether to examine further with radar equipment and thermal imaging, and perhaps, a fiberoptic camera to take a peek through the walls of Tut's chamber.