  The OPERA experiment is aiming at the first direct detection of neutrino
oscillations in appearance mode through the study of the {\nu}{\mu} {\tp}
{\nu}{\tau} channel. The OPERA detector is placed in the CNGS long baseline
{\nu}{\mu} beam 730 km away from the neutrino source. The analysis of a
sub-sample of the data taken in the 2008-2009 runs was completed. After a brief
description of the beam and the experimental setup, we report on event analysis
and on a first candidate event, its background estimation and statistical
significance.
