US 'deeply concerned' after deadly Israel strike on Gaza school

"We are deeply concerned about reports of civilian casualties in Gaza" following the strike, National Security Council spokesman Sean Savett said in a statement.

"We are in touch with our Israeli counterparts, who have said they targeted senior Hamas officials, and we are asking for further details," Savett said.

The strike "underscores the urgency of a ceasefire and hostage deal, which we continue to work tirelessly to achieve," he added.