US Secretary for Defence Jim Mattis speaks to reporters aboard a military jet as he travels for a visit to Oman late on March 10, 2018. Thomas Watkins / AFP
US Secretary for Defence Jim Mattis speaks to reporters aboard a military jet as he travels for a visit to Oman late on March 10, 2018. Thomas Watkins / AFP
Mattis discusses Qatar crisis and Yemen with Oman's Sultan Qaboos
'The Sultan assured Mr Mattis that he would try and arbitrate a peaceful conclusion in Yemen,' foreign ministry source says
