Striker Mauro Zarate has moved from West Ham to Italian club Fiorentina.
The 28-year-old joined the Hammers from Velez Sarsfield in summer 2014 struggled for first-team football last season before going on loan to QPR.
Argentine Zarate scored five goals in 21 appearances this season for the Upton Park club.
“West Ham would like to thank Mauro for his efforts in claret and blue and wish him all the best in his future career,” said a Hammers statement.
Find all the latest football transfers