A structure quite similar to the tomb of Hotepsekhemwi was found to the east of it, slightly more away from the much more recent pyramid of Unas.
A cursory examination has brought to light some seals bearing the name of the 2nd Dynasty king Ninetjer, which has allowed us to identify this tomb as Ninetjer's.
When it was first entered by archaeologists, it was also found to contain thousands of mummies of the Late Dynastic Period and later. These mummies clearly belonged to intrusive burials of that date.
Further examination of this tomb is required, not only to map it but also in the hopes that it can help us understand the history of the 2nd Dynasty a bit better.