Mostafa al-Waziri, secretary general of the Supreme Council of Antiquities, says the discovery is "rare" and reveals more about the development of pottery manufacturing and the daily lives of ancient Egyptians during that time in history.
The opening had been delayed for three days to water leaks.
He further pointed out that no evidence such as silver or gold metallic masks, small statues, amulets or inscriptions were found to prove that the mummies belong to a royal family.
CAIRO - 19 July 2018: Egypt started opening the mysterious sarcophagus unearthed 20 days ago in Alexandria, amid rumors over a "possible curse" that could be cast on the world once the sarcophagus is opened. It's uncertain if that suggestion is accurate.
Egypt's Antiquities Ministry said that after an initial round of preservation work, the 30-ton sarcophagus will be lifted out from the construction site and transferred to its facilities. Researchers opened the sarcophagus at the site where it was discovered. When exactly did they live? What killed them? Why were they buried in such a giant sarcophagus? And how did so much liquid sewage get into the sarcophagus?
Theories had been rattling around that it belonged to Alexander the Great, whose burial place has never been found and the person in which Alexandria is named after. Once the last pharaoh, Cleopatra VII, killed herself in 30 B.C., the Roman Empire took over Egypt.
Shaaban Abdel-Moneim, an expert on mummies, said that the skull of one of the skeletons bears the mark of an arrow wound. The exact age of the skeletons is unclear. In ancient Egypt, it was not uncommon for a sarcophagus to be reused, the bodies of its former occupants removed and new occupants put inside.
Experts were elated when they found the 10ft long sarcophagus, which dates back to the Ptolemaic dynasty that lasted between 305BC and 30BC.
Nevertheless, the skeletons will be moved to the National Museum of Alexandria to be studied.