Members of the City Council are sharply divided on the United Nations’ proposal to “consolidate” offices by constructing a 35-story office tower, and they introduced two completely different resolutions about the world body yesterday.

One resolution denounces the expansion and calls on the state Legislature to reject it. The other touts the United Nations’ contribution to the city and backs the building the international body wants to erect on the blacktop park adjacent to its Turtle Bay headquarters. The project has been blocked from coming to a vote in the state Legislature, and council members have not yet voted on it.

City Hall was the scene of dueling news conferences yesterday.

On one side was Council Member Simcha Felder, Democrat of Brooklyn, who is lead sponsor of the anti-expansion resolution, as first reported in The New York Sun. Mr. Felder, who has said the United Nations is at the “core of hate against democracy and hate against America,” was joined by Council Members Melinda Katz, Peter Vallone Jr., Lewis Fidler, Michael Nelson, and Domenic Recchia. The Felder resolution also has support from Council Members James Oddo, Helen Sears, Dennis Gallagher, and Madeline Provenzano. All are from districts in the outer boroughs.

“The only thing that the United Nations is united against, the only thing on a constant basis, is being anti-United States and anti-Israel,” Assemblyman Dov Hikind said at the news conference. Like Mr. Felder, who used to work for him, Mr. Hikind is a Democrat from a chasidic neighborhood in Brooklyn and has been an outspoken opponent of the project.

While Ms. Katz did speak about U.N. policies, the Queens Democrat characterized the institution as an unfit neighbor that did not deserve to be awarded with approval of the project. If the project ultimately receives the state approval it needs, and then wends its way through a city review process, it could land in Ms. Katz’s land-use committee.

“The United Nations has done nothing to make themselves a partner in what we are trying to do,” she said.

“I find myself in a funny circumstance of quoting Senator Bruno,” she said, “by saying that if they can’t pay $195 million in parking fines, how do we know that they are going to pay down the debt required for this piece of property?” She was referring to Joseph Bruno, the Republican who is Senate majority leader.

Council Member Charles Barron, a Democrat from Brooklyn who is planning to run in the mayoral primary next year, introduced a resolution supporting the U.N. proposal.

“The U.N. employs 16,400 people,” he said yesterday afternoon. “The U.N., since its inception, has drawn over 40 million tourists and infused $2.5 billion into New York’s economy. This is a no-brainer.”

Mr. Barron’s resolution has support from Council Members Yvette Clarke, Helen Foster, Robert Jackson, and Philip Reed. Mr. Reed and Mr. Jackson represent Manhattan districts.

Mr. Barron, who said he is continuing to recruit support, disputed accusations from his colleagues that the United Nations is anti-American, anti-Israel, and anti-Semitic, arguing that it was being attacked because it did not support the war in Iraq.

Though the speaker of the council, Gifford Miller, who also plans to run in the mayoral primary, has not signed on to any resolution, he, too, told reporters yesterday that he thinks the U.N. should be able to expand. Mr. Miller, who represents much of the Upper East Side, steered clear, however, of commenting on the U.N. policies.

“I think there are community issues that need to be addressed,” he said, referring to concerns about building on the site of the Turtle Bay playground. “I don’t think that we should be turning this into a referendum on the policies and views of the member nations.”

Mr. Miller, Mr. Barron, and Mayor Bloomberg, strange political bedfellows, all agree on allowing the project to move forward.