Reporters with the Associated Press and Al Jazeera were given just an hour to evacuate their offices before Israel bombed the building.
U.S. Secretary of State Antony Blinken began a regional tour to shore up last week's cease-fire between Israel and Gaza's Hamas rulers.
Thousands took to the streets of Gaza as the cease-fire took hold. Spontaneous celebrations also broke out in east Jerusalem and across the occupied West Bank.
Days of Israeli strikes on Gaza and Hamas rocket attacks inside Israel have killed at least 232 Palestinians and 12 Israelis, and wounded hundreds more.
While Joe Biden “expressed support” for a cease-fire, progressive Democrats are demanding a more forceful stance as Israeli forces killed over 200 Palestinians.
As international outcry grows, the Biden administration has declined so far to criticize Israel’s part in the fighting.
As President Joe Biden stays silent on cease-fire between Israel and militant group Hamas, dozens of Senate Democrats are calling for a temporary halt of violence.
The Israeli government has not provided clear evidence supporting its decision to level the tower in Gaza City, The Associated Press’ executive editor said.
"Free Palestine" rallies have taken place in several major cities, including Washington, London, Montreal and Sydney, amid escalating Gaza-Israel violence.
Israel carried out an intense barrage of airstrikes just after sunrise, striking dozens of targets in several minutes that set off bone-rattling explosions across Gaza.