  The strong constraints from the Fermi-LAT data on the isotropic gamma-ray
background suggest that the neutrinos observed by IceCube might possibly come
from sources that are hidden to gamma-ray observations. A possibility recently
discussed in the literature is that neutrinos may come from jets of collapsing
massive stars which fail to break out of the stellar envelope, and for this
reason they are known as choked jets, or choked Gamma-Ray Bursts (GRBs). In
this paper, we estimate the neutrino flux and spectrum expected from these
sources, focusing on Type II SNe. We perform detailed calculations of pg
interactions, accounting for all the neutrino production channels and
scattering angles. We provide predictions of expected event rates for operating
neutrino telescopes, such as ANTARES and IceCube, as well as for the future
generation telescope KM3NeT. We find that for GRB energies channeled into
protons spanning between 10^51 - 10^53 erg, choked GRBs may substantially
contribute to the observed astrophysical neutrino flux, if their local rate is
80 - 1 Gpc^-3 yr^-1 respectively.
