  We report evidence from APOGEE for the presence of a new metal-poor stellar
structure located within $\sim$4~kpc of the Galactic centre. Characterised by a
chemical composition resembling those of low mass satellites of the Milky Way,
this new inner Galaxy structure (IGS) seems to be chemically and dynamically
detached from more metal-rich populations in the inner Galaxy. We conjecture
that this structure is associated with an accretion event that likely occurred
in the early life of the Milky Way. Comparing the mean elemental abundances of
this structure with predictions from cosmological numerical simulations, we
estimate that the progenitor system had a stellar mass of
$\sim5\times10^8M_\odot$, or approximately twice the mass of the recently
discovered Gaia-Enceladus/Sausage system. We find that the accreted:{\it in
situ} ratio within our metal-poor ([Fe/H]$<$--0.8) bulge sample is somewhere
between 1:3 and 1:2, confirming predictions of cosmological numerical
simulations by various groups.
