  We report the detection of 3 additional Wolf-Rayet stars in the young cluster
Westerlund 1. They were selected as emission-line star candidates based on 1
micron narrow-band imaging of the cluster carried out at OPD/LNA (Brazil), and
then confirmed as Wolf-Rayet stars by K-band spectroscopy performed at the 4.1
m SOAR telescope (Chile). Together with previous works, this increases the
population of Wolf-Rayet stars detected in the cluster to 22 members. Moreover,
it is presented for the first time a K-band spectrum of the luminous blue
variable W243, which apparently implies in a higher temperature than that
derived from optical spectra taken in 2003. The WC9 star WR-F was also
observed, showing clear evidence of dust emission in the K-band.
