Egyptian security officials at the Cairo International Airport foiled a plot to smuggle out of the country mummified limbs that were hidden inside a loudspeaker, Egypt’s Ministry of Antiquities announced on Sunday. The contraband was to be loaded on a plane to Belgium when authorities spotted something strange on the X-rays.

In a hollowed-out speaker, they found six preserved body parts belonging to two different mummies: two sets of feet and lower legs; two sets of hands and forearms; an upper arm; and part of an upper torso, according to Iman Abdel-Raouf, an Egyptian official who works on archaeological matters. The authorities did not identify the smuggler, or whether any perpetrators were charged.

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The recovered remains will be brought to the Egyptian Museum in Cairo so that a team of archaeologists can inspect and conserve them, according to the ministry. Their analysis could provide insight into the origins of these body parts, and how they relate to other discoveries. Every artifact from Egypt’s past, no matter the size, helps shape scientists’ understanding of its ancient civilizations.