This as the death toll of Americans killed in the Saturday Hamas attack has risen to 27.

The numbers of missing Americans now stands at 14, according to a briefing by National Security Council spokesman John Kirby. These are presumed to be in captivity in Gaza. "The U.S. does not know anything about the condition of the U.S. hostages held by Hamas," Kirby confirmed.

Additional developments from various news wires and breaking headlines:

Israel says it has dropped 6,000 bombs in six days of bombardment

Israeli minister says no electricity, fuel or humanitarian aid into Gaza until Hamas releases all captives taken in unprecedented attack.

UK to send navy ships, surveillance planes to support Israel

Hamas calls high civilian death toll from Saturday assault "collateral damage" - 'Things went out of control': Hamas addresses high Israeli civilian death toll

After Blinken, Pentagon chief to also visit Israel

Blinken in Tel Aviv: As long as US exists, Israel won't have to defend itself alone

Two Israeli police officers wounded, one seriously, in shooting near Old City in Jerusalem

Blinken says none of $6 billion in Iranian funds in Qatar have been spent or accessed

Netanyahu: Unity government sends a 'huge message'; Israel will wipe out 'barbaric' Hamas

US to arrange charter flights for citizens to depart Israel

Marine unit leaves Kuwait exercise early because of 'emerging events'

'No conditions' on use of US military support to Israel: Defence Sec. Austin

Families of UK citizens held hostage in Gaza beg for help: Captors 'have no mercy'

Kirby: we support X taking down some misinformation on conflict

Kirby: grateful that X removed misinformation on Israel attack

Russia: Israeli airstrikes on Syria are a gross violation of sovereignty of Syria and basic norms of international law

The IDF build-up ahead of an expected ground assault into Gaza continues...