After weeks of punishing airstrikes, Israel has sent troops and tanks across the border into Lebanon.

Protests gripped Israel following the death of six hostages in Gaza as frustration mounted with the country's leadership for failing to secure a ceasefire deal that would free Israeli captives.

World leaders are urging Israel and Iran to de-escalate their conflict as the long-standing foes launch a new round of deadly strikes.

Israel's air force says it is preparing to assist troops in a potential ground operation in Lebanon as several countries called for a ceasefire.

Israel has fired artillery and mounted more air strikes against Palestinian militants in the Gaza Strip amid constant rocket fire deep into Israel's commercial centre.

Egypt has proposed an initial two-day ceasefire in Gaza to exchange four Israeli hostages of Hamas for some Palestinian prisoners, Egypt's president said as Israeli military strikes killed 45 Palestinians across the enclave.

A missile fired by Yemen's Houthi rebels has landed near Israel's main international airport, sending a plume of smoke into the air and causing panic among passengers in the terminal building.

The release of hostages under a temporary truce between Israel and Hamas militants has been postponed for 24 hours, Israel's national security adviser says.

The Israeli military says it is calling up two additional reserve brigades to the northern border with Lebanon to carry out operational activities.

Israeli Prime Minister Benjamin Netanyahu has said Israel will not pay any price for the return of hostages being held in Gaza.