  A search for physics beyond the standard model in events with at least three
leptons and any number of jets is presented. The data sample corresponds to 35
inverse picobarns of integrated luminosity in pp collisions at sqrt(s) = 7 TeV
collected by the CMS experiment at the LHC. A number of exclusive multileptonic
channels are investigated and standard model backgrounds are suppressed by
requiring sufficient missing transverse energy, invariant mass inconsistent
with that of the Z boson, or high jet activity. Control samples in data are
used to ascertain the robustness of background evaluation techniques and to
minimise the reliance on simulation. The observations are consistent with
background expectations. These results constrain previously unexplored regions
of supersymmetric parameter space.
