  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 also known as choked jets. In this paper, we estimate the
neutrino flux and spectrum expected from these sources. We perform detailed
calculations of p-gamma interactions, accounting for all the neutrino
production channels and scattering angles. We provide predictions of expected
event rates for operating neutrino telescopes, as ANTARES and IceCube, as well
as for future generation telescopes as KM3NeT. We find that if 10%-100% of the
Gamma-Ray Burst (GRB) energy is channeled into protons, choked GRBs may
reproduce the observed astrophysical neutrino flux, if their local rate is
3-0.3 Gpc^(-3) yr^(-1). This rate is consistent with the rate of GRBs detected
in gamma rays.
