  NA61/SHINE is a multi-purpose experiment to study hadron-proton,
hadron-nucleus and nucleus-nucleus collisions at the CERN Super Proton
Synchrotron (SPS). The experiment performs unique measurements for the physics
of strong interactions as well as important reference measurements for neutrino
and cosmic-ray physics.
  The primary goals of the experiment are the study of the onset of
deconfinement and the search for the critical point of the strongly interacting
matter, to uncover the mechanism of thermalisation and to test the validity of
statistical models. For this purpose, a two-dimensional scan was performed by
varying the beam momentum (13$A$--158$A$~GeV/$c$) and the size of colliding
systems (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb).
  In this contribution, we present recent NA61/SHINE results on the search for
critical effects in spectra and fluctuations. We see no clear indication for
the onset of deconfinement for intermediate colliding systems. Nevertheless,
results from p+p interactions on spectra and onset of deconfinement reveal
anomalous behaviour in proximity to transition energy. In fluctuation analysis
of collisions of medium size nuclei at the top SPS energy, no prominent signal
of critical point was observed.
