A new UN report details potential war crimes committed by the warring factions in Yemen, including by the Saudi-led coalition backed by the United States.

The big picture: Most of the at least 16,706 civilian casualties over the last three years are due to coalition airstrikes, according to the report. On Tuesday morning, Defense Secretary Jim Mattis told reporters the U.S. would "continue to work" with the coalition, from whom he has "not seen any callous disregard" for human life.

The details