; (ii) a written agreement under section 287(g) of the Immigration and Nationality Act ( 8 U.S.C. 1357(g) ); and (iii) detainers placed by U.S. Immigration and Customs Enforcement. 123. Report on United States citizens detained or deported (a) Initial report Not later than 90 days after the date of the enactment of this Act, the Secretary of Homeland Security shall submit to Congress a report on the number of United States citizens detained or removed from the United States during the period beginning on January 20, 2017, and ending on January 20, 2021. (b) Quarterly report Not less frequently than quarterly, the Secretary of Homeland Security shall submit to Congress a report on any United States citizen detained or removed from the United States during the preceding quarter, including a description of the actions taken by the Secretary in response to each such detention or removal. 124. Protections for United States citizen children abroad (a) Report on United States citizen children accompanying removed parents (1) In general Not less frequently than semiannually, the Secretary of State, with the cooperation of the Secretary of Homeland Security, shall submit to Congress a report on known citizens of the United States under the age of 18 years who leave the United States to accompany an alien parent or legal guardian who has been removed from the United States. (2) Elements Each report required by paragraph (1) shall include, for the preceding reporting period— (A) the number of such citizens of the United States; and (B) for each such citizen of the United States— (i) his or her current age; (ii) the age at which he or she departed the United States; (iii) his or her country of residence; (iv) an assessment whether— (I) either parent was deported or removed from the United States; (II) either parent remains in the United States; and (III) he or she was in foster care in the United States at any time