Despite Israeli officials and Hamas signaling openness to a cease-fire on Friday, violence continued early Saturday when an Israeli air raid in Gaza City killed at least 10 Palestinians, reportedly mostly children, in a refugee camp. It appears to be the deadliest individual strike since the latest phase of the conflict broke out last week, The Associated Press reports. Later, an airstrike flattened a tower in Gaza, which housed both Al Jazeera and AP's offices. People were reportedly notified to evacuate beforehand. Hamas said it was firing rockets at Tel Aviv in return. More than 130 people have been killed in Gaza, as well as eight people in Israel, since the violence began. Hady Amr, an envoy from the United States, arrived in Israel on Friday and is scheduled to join Israeli and Palestinians officials for de-escalation talks in Jerusalem on Saturday.