The move underlines how Trump's aggressive stance on the oil market is unsettling OPEC and testing ties between Riyadh and Washington.
Israeli military strikes more than 20 targets in Gaza in response.
It's a sale that would make King Midas — and likely President Donald Trump — proud.
The Saudis are "determined to get to the bottom" of what happened, said the secretary of state.
Lagarde originally said she was "horrified" over Jamal Khashoggi's disappearance but would not change her travel plans.