The violence has also spread within Israel itself, with Arabs and Jews attacking each other in several mixed cities, setting vehicles ablaze and destroying property.
Jordan, a close Western ally that made peace with Israel in 1994, has a large Palestinian population.
JERUSALEM — Israeli airstrikes on Gaza City flattened three buildings and killed at least 23 people on Sunday, medics said, making it the deadliest single attack since heavy fighting broke out between Israel and the territory’s militant Hamas rulers nearly a week ago.
The Gaza Health Ministry said another 50 people were wounded in the attack. Rescuers were racing to pull survivors and bodies from the rubble.
Earlier, the Israeli military said it destroyed the home of Gaza’s top Hamas leader in a separate strike. It was the third such attack in the last two days.
Israel appears to have stepped up strikes in recent days to inflict as much damage as possible on Hamas as efforts to broker a cease-fire accelerate. A U.S. diplomat is in the region to try to de-escalate tensions, and the U.N. Security Council is set to meet Sunday.
The military said it struck the homes of Yehiyeh Sinwar, the most senior Hamas leader inside the territory, and his brother Muhammad, another senior Hamas member. On Saturday it destroyed the home of Khalil al-Hayeh, a senior figure in Hamas’ political branch.