Maiga spent the second half of last season loaned out to Queen Park Rangers but failed to make an impact and returned to the Hammers in the summer where he was relegated to the development squad. The 26-year-old forward previously played for Le Mans and Sochaux in France before joining West Ham.
Last week West Ham signed Metz’s Senegal striker Diafra Sakho for an initial fee of £2.5m and made an immediate impact by scoring in last night’s Carling cup game. Maiga has scored 6 goals for the Hammers from 37 appearances and has just under 2 years remaining on his contract.
Metz are thought to paying £6,000 of Maiga £30,000 per week wages.