The 26-year old Mali international joined the Hammers from French club Sochaux in July 2012 but has made just 31 appearances in the Premier League, including 13 starts, and could be ready to move on.
His agent Willie McKay told Sky Sports: "Sivasspor have expressed an interest in Maiga and we are talking to them and several other clubs.
"There are other Turkish clubs, French clubs and two in the UK who are interested in him.
"West Ham are ready to let him leave and it could be a permanent deal.
"Modibo might go out later this week to Turkey for talks and have a look around the clubs who are interested."
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