We present a set of results obtained by experiment NA50 at the CERN SPS. In
Pb-Pb collisions, the phi meson yield and the muon pair mass continuum in
the invariant mass range (1.5 - 2.5 GeV/c(2)) exhibit a significant enhance
ment which increases with the centrality of the collision. The measured J/p
si suppression pattern rules out conventional hadronic scenarios and provid
es evidence for quark-gluon deconfinement.