  Gamma-Ray Bursts (GRBs) have been proposed as a leading candidate for
acceleration of ultra high-energy cosmic rays, which would be accompanied by
emission of TeV neutrinos produced in proton-photon interactions during
acceleration in the GRB fireball. Two analyses using data from two years of the
IceCube detector produced no evidence for this neutrino emission, placing
strong constraints on models of neutrino and cosmic-ray production in these
sources.
