  The charmless decays $B^{\pm} \rightarrow K^{+}K^{-}\pi^{\pm}$ and $B^{\pm}
\rightarrow \pi^{+}\pi^{-}\pi^{\pm}$ are reconstructed in a data set,
corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of pp collisions at
a center-of-mass energy of 7 TeV, collected by LHCb in 2011. The inclusive
charge asymmetries of these modes are measured to be $A_{CP}(B^{\pm}
\rightarrow K^{+}K^{-}\pi^{\pm}) =-0.141 \pm 0.040 (stat) \pm 0.018 (syst) \pm
0.007 (J/\psi K^{\pm})$ and $A_{CP}(B^{\pm} \rightarrow
\pi^{+}\pi^{-}\pi^{\pm}) = 0.117 \pm 0.021 (stat) \pm 0.009 (syst) \pm 0.007
(J/\psi K^{\pm})$, where the third uncertainty is due to the CP asymmetry of
the $B^{\pm} \rightarrow J/\psi K^{\pm}$ reference mode. In addition to the
inclusive CP asymmetries, larger asymmetries are observed in localized regions
of phase space.
