Amirov last played for Turanspor in Turkish League as a forward, but his track record as a striker both for his club and his national team hasn't been too impressive.
The official tweet from the club read:
The 29-year-old forward is known for his strong physical play. He is good in aerial battles and stands at 6ft 2 inches tall.
The Kyrgyzstani of Tatar descent has played for more than a decade for his country but has only scored twice in 33 appearances.
East Bengal drew their opening I-League game at home against Aizawl FC 1-1.