SANA, Yemen — Airstrikes carried out by warplanes from a military coalition led by Saudi Arabia killed at least 19 people, mostly children, on Saturday in a residential area and a school in northern Yemen, witnesses and hospital officials said.

One bombardment in the village of Birken in the Razih District, near Yemen’s northern border with Saudi Arabia, struck the home of Ali Okri, a school principal, killing his wife and four of their children.

Then, in what has become known in the war here as a double tap, a second airstrike killed four more of Mr. Okri’s relatives as rescuers were trying to free them from the rubble.

In the Haydan District, another northern area, airstrikes on Saturday hit a school, killing 10 students and wounding 28 others, an official at a nearby hospital said.