  In a minimal model of universal extra dimensions the lightest Kalzua-Klein
particle is neutral and stable because of Kaluza-Klein parity conservation and
it is a dark matter candidate.
  The corresponding level 2 mode of the lightest Kaluza-Klein particle can be
detected via KK number violating decays to Standard Model particles. The
expected sensitivity to second level Kaluza-Klein modes of neutral gauge bosons
at the ILC is studied.
