Jimmy D. Clark, federal prisoner # 57808-080, appeals the dismissal of his 28 U.S.C. § 2241 petition challenging his 1994 guilty-plea conviction of bank robbery and his 204-month prison sentence. Clark contends that his sentence was unconstitutional in light of United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), and Blakely v. Washington, 542 U.S. 296, 124 S.Ct. 2531, 159 L.Ed.2d 403 (2004), and that he should be permitted to assert his Booker claim in a § 2241 proceeding under the savings clause of 28 U.S.C. § 2255. Because Blakely and Booker are not retroactively applicable to cases on collateral review, Clark cannot show that he should be permitted to assert his claims under the savings clause of § 2255. See Padilla v. United States, 416 F.3d 424, 426-27 (5th Cir. 2005); ReyesRequena v. United States, 243 F.3d 893, 904 (5th Cir. 2001). The district court’s judgment is affirmed.

Clark’s most recent § 2241 petition is only his latest of several frivolous attempts to circumvent the statutory limitations on filing successive § 2255 motions. Clark is hereby warned that future frivolous filings in this court or in the district court will invite the imposition of sanctions, including monetary penalties and restrictions on his ability to file actions and appeals.

AFFIRMED; SANCTION WARNING ISSUED.