The remains were located north of King Sneferu's bent pyramid in the Dahshur royal necropolis south of Cairo, the head of the Ancient Egyptian Antiquities Sector, Mahmoud Afifi, said in a statement.
Due to the bent slope of its sides, the pyramid is believed to have been ancient Egypt's first attempt to build a smooth-sided pyramid.
The necropolis was the burial site for courtiers and high-ranking officials.
Adel Okasha, the head of Dahshur necropolis, said the remains belong to the inner structure of the pyramid, including a corridor.
Other remains included blocks showing the interior design of the pyramid.
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