  The flux of low energy neutrinos (<E_nu>~ 4 GeV) has been studied with the
MACRO detector at Gran Sasso via the detection of muon neutrinos interactions
inside the apparatus, and of upward-going stopping muons. Data collected in ~3
y with the full apparatus were analyzed. The results are compatible with a
deficit of the flux of atmospheric muon neutrinos from below, and no reduction
from above, with respect to Monte Carlo predictions. The deficit and the
angular distributions are interpreted in terms of neutrino oscillations, and
compared with the MACRO results on the upward throughgoing muons (<E_nu>~ 100
GeV).
