Owusu Yaw (Yaw), a native and citizen of Ghana who is subject to a final order of removal issued in 2003, appeals the district court’s dismissal of his 28 U.S.C. § 2241 application for a writ of habeas corpus challenging the denial of due process during his removal proceedings and his mandatory detention under 8 U.S.C. § 1226(c).

Although the district court did not address Yaw’s due process and mandatory detention claims, we nevertheless affirm the district court’s dismissal of Yaw’s 28 U.S.C. § 2241 application. See Bickford v. Int’l Speedway Corp., 654 F.2d 1028, 1031 (5th Cir. 1981). Yaw failed to make an initial showing of substantial prejudice as to his due process claim. See *601 Anwar v. INS, 116 F.3d 140, 144 (5th Cir. 1997). Further, because Yaw was not detained under 8 U.S.C. § 1226(c) when he filed the instant 28 U.S.C. § 2241 application, he lacked Article III standing to challenge his detention under 8 U.S.C. § 1226(c). See Lujan v. Defenders of Wildlife, 504 U.S. 555, 560-61, 112 S.Ct. 2130, 119 L.Ed.2d 351 (1992). Finally, because Yaw did not challenge his post-removal detention under 8 U.S.C. § 1231(a) in the district court, this court need not consider it. See Flores-Garza v. INS, 328 F.3d 797, 804 n. 7 (5th Cir. 2003).

Accordingly, the district court’s judgment is AFFIRMED.