Brest made a pair of loan signings on Tuesday, with Auxerre striker Issam Jemaa and Udinese midfielder Abdou Sissoko joining until the end of the season.
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Auxerre confirmed they were allowing Tunisia international Jemaa, 28, to move to their Ligue 1 rivals after he has struggled to secure regular first-team football following his move from Lens last summer.
"Issam Jemaa will join Stade Brest for the rest of the season in Ligue 1 with an option to buy," a statement on their website read.
Jemaa is currently at the African Nations Cup, where he has scored once as Tunisia have sealed their place in the quarter-finals with a match to spare.
Brest confirmed the signing of Sissoko on their website this afternoon.
The 21-year-old came through the ranks at Troyes before moving to Italy last summer.