Egyptian archaeologists uncovered a tomb containing 50 mummies dating back to the Ptolemaic era, in Minya, south of Cairo.
According to the report, mummies found in the Egyptian tomb are in "good condition" and are more than 2,000 years old.
Twelve children and six animals were among the 50 mummies, while the rest were adult men and women told an archaeologist Rami Rasmi.
The identities of the mummies were still unknown, said Mostafa Waziri, secretary-general of the Supreme Council of Antiquities.
"We have not found names written in hieroglyphics," he said, adding it was obvious from the mummification method that the individuals whose remains were found had to some extent held important or prestigious positions.
Archaeologist Mohamed Ragab said two tombs were discovered nine metres underground and contained more than six rooms.
The presence of mummified pets — mostly dogs — showed how important they were for the dead.
"These animals were so dear to their owners that they buried them...in their tomb," Ragab said.