  We study the spectral statistics of interacting spinless fermions in a
two-dimensional disordered lattice. Within a full quantum treatment for small
few-particle-systems, we compute the low-energy many-body states numerically.
While at weak disorder the interactions reduce spectral correlations and lead
to localization, for the case of strong disorder we find that a moderate
Coulomb interaction has a delocalizing effect. In addition, we observe a
non-universal structure in the level-spacing distribution which we attribute to
a mechanism reinforcing spectral correlations taking place in small systems at
strong disorder.
