UNITED NATIONS — With Jerusalem enforcing a blanket embargo on diplomatic negotiations with Ramallah, two major figures in the newly formed Palestinian Arab coalition government, Finance Minister Salam Fayyad and Foreign Minister Ziad Abu Amr, are emerging as its main interlocutors with the outside world.

The two officials are seen in Washington, as well as at the United Nations, as reasonable, nonpartisan members of the Hamas-led government. Diplomats anticipate that the two politicians — along with the president of the Palestinian Authority, Mahmoud Abbas — to become the main intermediaries of the Palestinian Arab leadership.

In a visit to Ramallah as part of an upcoming Middle East tour, Secretary-General Ban is expected to meet with the two newly minted Cabinet ministers, despite Israel’s continued opposition to any negotiations with a Palestinian Arab government led by Hamas, which yesterday launched its first cross-border attack against Israel since forming the new Cabinet last Thursday.

“It would be a mistake for the world to shun those ministers in the new unity government who are not Hamas members,” Mr. Ban said, according to the leader of the left-wing Meretz Party, Yossi Beilin. “He said we need to intensify a dialogue” with people like Messrs. Fayyad and Abu Amr, Mr. Beilin told The New York Sun on a visit here yesterday.

Mr. Beilin urged Mr. Ban to replace the three principles set last year by the so-called quartet — America, Russia, the European Union, and the United Nations — with new conditions that presumably would be more palatable to the Palestinian Arabs. But in its first official response to the new government in Ramallah, expected today, the quartet is likely to stress its known demands.

Last year, the quartet conditioned renewal of diplomatic ties with the Hamas-led government on its recognizing Israel, renouncing violent attacks, and accepting all prior signed agreements. As part of a recent pact in Mecca that led to a lull in the fighting in Gaza, Hamas agreed to “respect” prior agreements, but it refused to accept the other principles.

Yesterday, the Palestinian Arab prime minister, Ismail Haniyeh of Hamas, stressed in several new interviews that his new government has the right to maintain “resistance in all its forms.”

“I am not going to try to interpret what the right of resistance means, but I’ll tell you it does not sound very good to me when one talks about ‘all forms of resistance,'” Secretary of State Rice said.

An employee of the Israeli electric company, Koby Ohion, was injured yesterday near Kibbutz Nahal Oz after shots were fired from the Palestinian Arab side of the border with Gaza. The incident occurred near the Karni crossing, the main gateway for civilian transportation into Israel from Gaza.

“This is Hamas’s answer, in record time — as soon as the coalition government was established — to all those who think there can be dialogue,” a senior diplomatic official in Jerusalem was quoted by the Israeli Web site Ynet as saying.

For Prime Minister Olmert and his aides, yesterday’s shooting served as confirmation of their doubts about any truce signed by a government controlled by Hamas. But Mr. Beilin said he urged Mr. Ban to drop the three principles in favor of much more lenient conditions.

“If the new coalition government would work toward freeing Gilad Shalit” — an Israeli soldier whom Hamas kidnapped last year — “and promise a complete cease-fire in Gaza and the West Bank, and if it commits to new diplomatic negotiations, it would be a terrible mistake to reject such proposals,” Mr. Beilin said.

The international diplomatic embargo against Hamas was broken yesterday when Norway’s deputy foreign minister, Raymond Johansen, visited Mr. Haniyeh and other Hamas officials in Gaza yesterday and called for other Europeans to follow suit.

But as quartet members negotiated the final details of their statement, expected to be released this morning, E.U., American, and U.N. diplomats said the three principles would not be dropped.

“I have to say that this government does not comply fully with the principles,” the E.U. foreign policy chief, Javier Solana, who has expressed enthusiasm about the Saudi-backed regional diplomacy, said.