The Trump administration was preparing Friday for a fresh round of military strikes against Iran, according to sources with direct knowledge of the planning, even as diplomacy continued.

Some members of the U.S. military and intelligence community canceled their plans for the Memorial Day weekend in anticipation of possible strikes, several sources said.

Defense and intelligence officials began updating recall rosters for U.S. installations overseas as tranches of troops stationed in the Middle East rotate out of theater, part of an effort to reduce the American military footprint in the region amid concern about possible Iranian retaliation.