Anisotropic transverse flow has been studied with a magnetic spectrome
ter at mid-rapidity and the Plastic Ball detector at target rapidity i
n the WA98 experiment. Our preliminary results show the existence of d
irected and elliptic flow in semi-central Pb+Pb collisions. The magnit
ude of the directed flow is found to be significantly smaller than tho
se observed at the AGS energies.