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Middlesbrough's Kei Kamara will miss up to a month with a knee injury sustained in last weekend's draw at Birmingham.

The Sierra Leone striker limped off in injury time at St Andrew's, shortly before Boro conceded a late equaliser.

He has scored four goals in 13 starts since joining the Championship side from Kansas City Wizards in September.

"He's a good player and good character for the team because Kei is always desperate to play - it's a blow," Boro manager Aitor Karanka told ´óÏó´«Ã½ Tees.

"It means other players have a chance to play. We have a lot of good forwards here."

Karanka also revealed that goalkeeper Jason Steele, who has missed the last three matches through suspension, will not return for Saturday's game with Brighton.

The 23-year-old has an ankle problem, meaning on-loan veteran Shay Given will continue to deputise.