  The main physics goals of the NA61/SHINE programme on strong interactions are
the study of the properties of the onset of deconfinement and the search for
signatures of the critical point of strongly interacting matter. For this
purpose a scan of the two dimensional phase diagram ($T$-$\mu_{B}$) is being
performed at the SPS by measurements of hadron production in nucleus-nucleus
collisions as a function of collision energy and system size.
  This contribution presents intriguing results on the energy dependence of
hadron spectra and yields in inelastic p+p and centrality selected Be+Be and
Ar+Sc collisions. In particular, the energy dependence of the signals of
deconfinement, the "horn", "step" and "kink", and new results on fluctuations
and correlations are shown and compared with the corresponding data of other
experiments and model predictions.
