U.S. President Donald Trump waves as he departs the White House for a trip to Lewisburg, West Virginia, in Washington D.C., U.S. April 5, 2018. REUTERS/Carlos Barria

WASHINGTON (Reuters) - U.S. President Donald Trump signed a memorandum on Friday ordering the end of a policy, known as “catch and release,” in which illegal immigrants are released from detention while awaiting a court hearing on their status.

As part of the memo, Trump asked Defense Secretary Jim Mattis to produce a list of military facilities that could be used to detain illegal immigrants.