The U.S. is sending a fresh round of bombs to Israel, two senior administration officials told NBC News, undermining the Biden administration’s public expressions of frustration at Israel’s conduct in the war and its own efforts at brokering a cease-fire.

The bombs are part of a weapons package that was approved for Israel years ago, but is only being fulfilled now — and includes more than 1,800 Mark 84 (MK84) 2,000-pound bombs and approximately 500 Mark 82 (MK82) 500-pound bombs,…