  We study LHC searches for an extension of the Standard Model (SM) by
exploiting an additional Abelian $U_D(1)$ gauge symmetry and a complex scalar
Higgs portal. As the scalar is charged under this gauge symmetry, a vector dark
matter (VDM) candidate can satisfy the observed relic abundance and limits from
direct dark matter (DM) searches. The ATLAS and CMS experiments have developed
a broad search program for the DM candidates, including associate production of
Higgs boson, Z boson and top quark which couple to DM. In this paper, we
perform an extensive analysis to constrain the model by using these experiments
at LHC. It can be seen that the LHC results can exclude some parts of the
parameter space which are still allowed by relic density and the direct
detection searches. Furthermore, exclusion limits on the parameter space of the
model by using the new results of CMS and ATLAS collaborations for new light
Higgs boson with mass $\sim95~\rm GeV$ are provided.
