Miran, who currently sits on the White House’s Council of Economic Advisers, would fill the seat through January.
Laurent Saint-Cyr is meant to be the last head of the council as it prepares for a nationwide vote to elect a president.
US Muslim group highlights the legal statutes that it says enable the Trump administration to investigate the incident.
Satellite images reportedly identify 26 mines in rebel-held Myanmar next to China and two near Thailand.