President Trump ordered airstrikes on the Houthi-held areas in Yemen, killing more than 50 people. NBC News' Matt Bradley has the latest on the rising tension in the Middle East.

The Iranian-backed rebels, who have targeted Israel and shipping in the Red Sea, said children were among those killed in the strikes ordered by President Trump.

U.S. Central Command continued strikes against the group Sunday and Monday, launching a campaign that may last weeks, officials said.

Oil prices rose slightly on Monday after the United States vowed to keep attacking Yemen's Houthis until the Iran-aligned group ends its assaults on shipping, while Chinese economic data buoyed hopes for higher demand.

Oil futures climbed on Monday, finding support after the U.S. over the weekend launched U.S. strikes on Houthi rebels in Yemen, raising the risk of disruptions to oil flow in the region.