Lambda, Xi and Omega yields and transverse mass spectra have been measured
in Pb-Pb and p-Pb collisions at 158 A GeV/c. The yields in Pb-Pb interactio
ns are presented as a function of the collision centrality and compared wit
h those obtained from p-Pb collisions. Strangeness enhancement is observed
which increases with centrality and with the strangeness content of the hyp
eron.