Thomas Jones, a federal prisoner (# 72557-079), appeals the dismissal of his 28 U.S.C. § 2241 habeas petition challenging his 210-month prison sentence imposed following his 1996 guilty-plea conviction of possession of cocaine with intent to distribute. Jones contends that his sentence is unconstitutional in light of United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), because it was based on facts that were neither determined by a jury nor admitted by him.

Because Jones challenges errors that occurred at sentencing, the claim may not be asserted in a § 2241 petition. See Padilla v. United States, 416 F.3d 424, 426-27 (5th Cir. 2005). Insofar as he has suggested that he is entitled to proceed under § 2241 based on the “savings clause” of 28 U.S.C. § 2255, because relief under the latter section is “inadequate or ineffective,” such suggestion is unavailing. Id. at 427. The district court’s judgment is AFFIRMED.