  Models with universal extra dimensions predict that each Standard Model
particle is accompanied by a tower of Kaluza-Klein resonances. Canonical
searches for the production and cascade decays of first Kaluza-Klein modes
through missing transverse momentum signatures suffer in general from low
detection efficiencies because of the rather compressed Kaluza-Klein particle
mass spectrum. Here, instead we analyze signatures from the production of
second Kaluza-Klein states which can decay into Standard Model particles and
thus do not result in any missing transverse momentum. Such signatures provide
a strong sensitivity, and are of particular interest as they would allow for a
clear distinction between extra dimension models and other models of new
physics like supersymmetry. We constrain the production of second Kaluza-Klein
particles from recent LHC searches for dilepton resonances, and place limits on
the compactification scale to be larger than 715GeV, and on the masses of the
second Kaluza-Klein particles to be larger than 1.4TeV.
