  Correlations induced by quantum statistics are sensitive to the
spatio-temporal extent as well as dynamics of particle emitting sources in
heavy-ion collisions. In addition, such correlations can be used to search for
the presence of a coherent component of pion production. Two and three-pion
correlations of same and mixed-charge are measured at low relative momentum to
estimate the coherent fraction of charged pions in Pb-Pb collisions at
$\sqrt{s_{\rm NN}}=2.76$ TeV at the LHC with ALICE. The genuine three-pion
quantum statistics correlation is found to be suppressed relative to the
two-pion correlation based on the assumption of fully chaotic pion emission.
The suppression is observed to decrease with triplet momentum. The observed
suppression at low triplet momentum may correspond to a coherent fraction in
charged pion emission of 23% $\pm$ 8%.
