  Recent detection of the neutrino event, IceCube-170922A by IceCube
observatory from the Blazar TXS 0506+056 in the state of enhanced gamma ray
emission indicates for acceleration of cosmic rays in the blazar jet. The
non-detection of the broadline emission in the optical spectrum of TXS 0506+056
and other BL Lac objects suggests that external photons emissions are weak and
hence photo-meson (p-gamma) interaction may not be a favored mechanism for high
energy neutrino production. The lack of broadline signatures also creates doubt
about the presence of a high density cloud in the vicinity of the super-massive
black hole (SMBH) of TXS 0506+056 and consequently raised question on
hadronuclear (pp) interaction interpretation like relativistic jet meets with
high density cloud. Here we demonstrate that non-relativistic protons in the
proton blazar model, those come into existence under charge neutrality
condition of the blazar jet, offer sufficient target matter for pp-interaction
with shock accelerated protons and consequently the model can describe
consistently the observed high energy gamma rays and neutrino signal from the
blazar TXS 0506+056.
