Sheffield United striker Luton Shelton has been called up to the Jamaica squad for their friendly against Trinidad & Tobago on March 26.The 23-year-old has appeared in 11 league games for the Blades, scoring once since signing from Swedish club Helsingborgs in January, 2007.

Shelton's call-up now means that United will have a total of six players representing their countries during the international break.

Meanwhile, winger Chris Armstrong has undergone a groin operation and is out of contention for at least three weeks.

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