Israel has intensified air strikes on Gaza City, flattening dozens of buildings and forcing thousands to flee. The push is aimed at seizing what Israel calls Hamas’s last stronghold, Reuters reported.

The escalation coincided with US Secretary of State Marco Rubio’s arrival in Israel, where he is pressing for the release of remaining hostages and discussing Gaza’s future reconstruction.

Tensions have deepened after Israel struck Hamas leaders in Doha, an attack that stalled ceasefire talks. Arab and Islamic leaders are set to meet in Qatar for an emergency summit on the crisis.