MUNICH (AP) -- Ukrainian President Volodymyr Zelenskyy says he directed his ministers not to sign off on a proposed agreement to give the United States access to Ukraine's rare earth minerals because the document was too focused on U.S. interests.

The proposal, which was a key part of Zelenskyy's talks with U.S. Vice President JD Vance on the sidelines of the Munich Security Conference on Friday, did not offer any specific security guarantees in return, according to one current and one former senior Ukrainian official familiar with the talks.

Zelenskyy's decision not to accept the proposal, at least for now, was described as "short-sighted" by a senior White House official.

"I didn't let the ministers sign a relevant agreement because in my view it is not ready to protect us, our interest," Zelenskyy told The Associated Press on Saturday in Munich.

The proposal focused on how the U.S. could use Kyiv's rare earth minerals "as compensation" for support already given to Ukraine by the Biden administration and as payment for future aid, the current and former senior Ukrainian officials said, speaking anonymously so they could speak freely.

Ukraine has vast reserves of critical minerals that are used in the aerospace, defense and nuclear industries. The Trump administration has indicated it is interested in accessing them to reduce dependence on China but Zelenskyy said any exploitation would need to be tied to security guarantees for Ukraine that would deter future Russian aggression.

"For me is very important the connection between some kind of security guarantees and some kind of investment," the Ukrainian president told AP.

Zelenskyy did not go into details about why he instructed his officials not to sign the document, which was given to Ukrainian officials on Wednesday by U.S. Treasury Secretary Scott Bassent on a visit to Kyiv.

"It's a colonial agreement and Zelenskyy cannot sign it," the former senior official said.

White House National Security Council spokesman Brian Hughes did not explicitly confirm the offer, but said in a statement that "President Zelenskyy is being short-sighted about the excellent opportunity the Trump administration has presented to Ukraine."

The Trump administration has grown weary of sending additional U.S. aid to Ukraine and Hughes said a minerals deal would allow American taxpayers to "recoup" money sent to Kyiv, while growing Ukraine's economy.

Hughes added that the White House believes "binding economic ties with the United States will be the best guarantee against future aggression and an integral part of lasting peace." He added: "The U.S. recognizes this, the Russians recognize this, and the Ukrainians must recognize this."

U.S. officials in discussions with their Ukrainian counterparts in Munich were commercially minded and largely concentrated on the specifics of exploring the minerals and how to form a possible partnership to do that with Ukraine, the senior official said.

The potential value of the deposits in Ukraine has not yet been discussed, with much unexplored or close to the front line.

The U.S. proposal apparently did not take into account how the deposits would be secured in the event of continuing Russian aggression. The official suggested the U.S. did not have "ready answers," to that question and that one of their takeaways from discussions in Munich will be how to secure any mineral extraction operation in Ukraine involving people and infrastructure.

Any deal must be in accordance with Ukrainian law and acceptable to the Ukrainian people, the senior Ukrainian official said.

"Subsoil belongs to Ukrainians under the constitution," Kseniiia Orynchak, founder of the National Association of Mining Industry of Ukraine, previously told the AP, suggesting a deal would need popular support.

Zelenskyy and Vance did not discuss the details of the U.S. document during their meeting Friday at the Munich conference, the senior official said. That meeting was "very good" and "substantive," with Vance making it clear his and Trump's main goal was to achieve a durable, lasting peace, the senior official said.

Zelenskyy told Vance that real peace requires Ukraine to be in a "strong position" when starting negotiations, stressed that the U.S negotiators should come to Ukraine, and that the U.S., Ukraine and Europe must be at the negotiating table for talks with Russia.

But Gen. Keith Kellogg, Trump's special envoy for Ukraine and Russia, all but cut Europeans out of any Ukraine-Russia talks, despite Zelenskyy's request.

"You can have the Ukrainians, the Russians, and clearly the Americans at the table talking," Kellogg said at an event hosted by a Ukrainian tycoon at the Munich conference. Pressed on whether that meant Europeans won't be included, he said: "I'm a school of realism. I think that's not going to happen."

Ukraine is now preparing a "counter proposal" which will be delivered to the U.S. in "the near future," the official said.

"I think it's important that the vice president understood me that if we want to sign something, we have to understand that it will work," Zelenskyy told the AP.

That means, he said, "it will bring money and security."

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Associated Press writers Aamer Madhani in Washington and Volodymyr Yurchuk and Susie Blann in Kyiv, Ukraine, contributed to this report.