Searches for squarks and gluinos at DØ

s = 1.96 TeV at the Fermilab Tevatron collider are discussed. For the inclusive searches, events with multiple jets of hadrons and large missing transverse energy in the final state are studied within the framework of minimal supergravity and assuming R-parity conservation. Searches for the scalar top quark are studied in two final state topologies: with events of two charm jets and large missing transverse energy or leptons, jets and missing transverse energy. The data, corresponding to integrated luminosities of up to 2.1 fb, show no excess of a signal above the expected background in any of the decay channels examined. Instead, upper limits at 95% Confidence Level on the squarks and gluino masses are derived.