We report on preliminary studies of colour reconnection effects in hadronic
decays of W pairs  with the L3 detector. The analysis is  based on the study
of the particle and energy flow between jets associated to the same W boson
and between two different W bosons in $qqqq$ events. The data sample corresponds
to a luminosity of 627 pb$^{-1}$ collected by the L3 detector during the years
1998-2000.