18 U.S.C. § 3042: Extraterritorial jurisdiction

Section 3041 of this title shall apply in any country where the United States exercises extraterritorial jurisdiction for the arrest and removal therefrom to the United States of any citizen or national of the United States who is a fugitive from justice charged with or convicted of the commission of any offense against the United States, and shall also apply throughout the United States for the arrest and removal therefrom to the jurisdiction of any officer or representative of the United States vested with judicial authority in any country in which the United States exercises extraterritorial jurisdiction, of any citizen or national of the United States who is a fugitive from justice charged with or convicted of the commission of any offense against the United States in any country where it exercises extraterritorial jurisdiction. Such fugitive first mentioned may, by any officer or representative of the United States vested with judicial authority in any country in which the United States exercises extraterritorial jurisdiction and agreeably to the usual mode of process against offenders subject to such jurisdiction, be arrested and detained or conditionally released pursuant to section 3142 of this title , as the case may be, pending the issuance of a warrant for his removal, which warrant the principal officer or representative of the United States vested with judicial authority in the country where the fugitive shall be found shall seasonably issue, and the United States marshal or corresponding officer shall execute. Such marshal or other officer, or the deputies of such marshal or officer, when engaged in executing such warrant without the jurisdiction of the court to which they are attached, shall have all the powers of a marshal of the United States so far as such powers are requisite for the prisoner’s safekeeping and the execution of the warrant.