  We discuss the behaviour of holographic entanglement entropy following a
local quench in 2+1 dimensional strongly coupled CFTs. The entanglement
generated by the quench propagates along an emergent light-cone, reminiscent of
the Lieb-Robinson light-cone propagation of correlations in non-relativistic
systems. We find the speed of propagation is bounded from below by the
entanglement tsunami velocity obtained earlier for global quenches in
holographic systems, and from above by the speed of light. The former is
realized for sufficiently broad quenches, while the latter pertains for well
localized quenches. The non-universal behavior in the intermediate regime
appears to stem from finite-size effects. We also note that the entanglement
entropy of subsystems reverts to the equilibrium value exponentially fast, in
contrast to a much slower equilibration seen in certain spin models.
