Updated

The Latest on the opening of the U.S. Embassy in Jerusalem and Palestinian protests (all times local):

9 a.m.

President Donald Trump's Mideast peace negotiator says moving the American embassy to Jerusalem is a "necessary condition" to a lasting peace deal between Israel and the Palestinians.

American officials are in Jerusalem for Monday's relocation of the embassy from Tel Aviv to the contested city, a move the Israeli government has embraced but the Palestinians have condemned.

Jason Greenblatt writes on Twitter that "the long-overdue step of moving our Embassy is not a departure from our strong commitment to facilitate a lasting peace deal."

Israel captured east Jerusalem in the 1967 Mideast war and annexed it in a move not recognized internationally. The Palestinians want east Jerusalem as the capital of their future state. They view the relocation as a blatant, one-sided move that invalidates America's role as an impartial peace broker.

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8:30 a.m.

Israel has warned Gaza residents they will be risking their lives if they approach the border during a planned mass protest.

The army says in the leaflets dropped by jets Monday that it will "act against every attempt to damage the security fence or harm IDF soldiers or Israeli civilians."

Gaza's ruling Hamas says it expects tens of thousands to join Monday's march, suggesting a possible border breach. The march is part of a campaign to break Gaza's decade-old border blockade. It's also a protest against the inauguration Monday of a U.S. Embassy in contested Jerusalem.

Since March, 42 Palestinian protesters have been killed and more than 1,800 wounded by Israeli army fire.

With Israel and Hamas digging in, there has been concern about large numbers of casualties Monday.