According to death tolls reported by both parties, Sunday was the deadliest day so far in the Israel-Gaza conflict. The Palestinian Health Ministry reported the death of 87 Palestinians, and the Israeli military said that 13 soldiers had died (via New York Times).

The mounting death toll signals that the war will be lengthier and costlier than it originally appeared. 

READ MORE: Gaza Ceasefire Ends, Explosions Resume

Sunday was the deadliest for Palestinians since Israel began its offensive on July 8th with air strikes intended to curb rocket fire, followed by a ground invasion to destroy tunnels into Israel built by Hamas. Most of the Palestinian deaths occurred in Shejaiya, an eastern neighborhood of Gaza City. 

READ MORE: Gaza Invasion Prompted By Hamas Tunnels Into Israel

For Israeli soldiers, Sunday’s death toll exceeded the number of soldiers killed in the past two Gaza offensives. 

President Obama expressed to Israeli Prime Minister Benjamin Netanyahu that he had “serious concerns” about the growing number of casualties due to the Gaza invasion. Mr. Obama also told Mr. Netanyahu that Secretary of State John Kerry will be traveling to Cairo to negotiate an immediate cease-fire. 

After a request from the Palestinians, the United Nations Security Council scheduled an emergency session to take place Sunday night. 

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Read more Neon Tommy coverage of the Israel-Gaza conflict here.