KYIV, Ukraine — Ukraine and Russia agreed in principle to a limited ceasefire after President Donald Trump spoke with the countries’ leaders this week, though it remains to be seen when it might take effect and what possible targets would be off limits to attack.

The tentative deal to partially rein in the grinding war came after Russian President Vladimir Putin rebuffed Trump’s push for a full 30-day ceasefire. The difficulty in getting the combatants to agree not to target one another’s energy infrastructure highlights the challenges Trump will face in trying to fulfill his campaign pledge to quickly end to the war.

Leaders Discuss Ceasefire Terms

After a roughly hourlong call with Trump on Wednesday that both leaders said went well, Ukrainian President Volodymyr Zelenskyy told reporters that “technical” talks in Saudi Arabia this weekend would seek to resolve what types of infrastructure would be protected under the agreement.

But it was immediately clear that the three parties had different views about what the pact entailed, with the White House saying “energy and infrastructure” would be covered, the Kremlin saying the agreement referred more narrowly to “energy infrastructure,” and Zelenskyy saying he’d also like railways and ports to be protected.

“One of the first steps toward fully ending the war could be ending strikes on energy and other civilian infrastructure,” Zelenskyy said on social media following his call with Trump, which came a day after the U.S. president held similar talks with Putin. “I supported this step, and Ukraine confirmed that we are ready to implement it.”

During their call, Trump suggested that Zelenskyy should consider giving the U.S. ownership of Ukraine’s power plants to ensure their long-term security, according to a White House statement from Secretary of State Marco Rubio and national security adviser Mike Waltz.

Trump told Zelenskyy that the U.S could be “very helpful in running those plants with its electricity and utility expertise,” the statement said.

Trump suggested “American ownership of those plants could be the best protection for that infrastructure,” according to White House officials. The idea was floated even as the Trump administration looks to finalize an agreement to gain access to Ukraine’s critical minerals as partial repayment for U.S. support for Ukraine during the war.

Zelenskyy, though, said the conversation focused on the Zaporizhzhia nuclear power plant — which is the largest of its kind in Europe and has been under Russian control since early in the war. He said Trump posed the idea of “an understanding” in which “the United States can recover” the plant.

Related Story: Zelenskyy Disputes Putin’s Vow Not to Hit Ukraine’s Energy Infrastructure

Differing Views on Ceasefire Implementation

The call, which Zelenskyy described as “fruitful,” came just weeks after a disastrous Oval Office meeting between the two leaders that led to Trump temporarily pausing intelligence sharing and military aid to Ukraine.

During the call, Zelenskyy requested additional Patriot defense missile systems. Rubio and Waltz said Trump “agreed to work with him to find what was available, particularly in Europe.”

On Tuesday, Putin told Trump that he would agree not to target Ukraine’s energy infrastructure but refused to back a full 30-day ceasefire that Trump proposed.

According to the Kremlin, Putin made clear to Trump that there must be a cessation of foreign military aid and intelligence sharing as part of any deal. But White House press secretary Karoline Leavitt on Wednesday underscored that U.S. “intelligence sharing in terms of defense for Ukraine” would continue.

Related Story: Zelenskyy Calls Oval Office Spat With Trump ‘Regrettable,’ Is Ready to Work for Peace

Accusations and Counteraccusations

Prior to his call with Trump, Zelenskyy said Putin’s limited ceasefire pledge was “very much at odds with reality” after Russia launched an overnight barrage of drone strikes across Ukraine, including some that struck Ukrainian energy facilities.

Russia responded by saying it had halted its targeting of Ukraine’s energy facilities and accused Kyiv of attacking Russian equipment near one of its pipelines.

“Unfortunately, we see that for now there is no reciprocity on the part of the Kyiv regime,” Kremlin spokesman Dmitry Peskov said.

The White House described Tuesday’s call between Trump and Putin as the first step in a “movement to peace.” But there was no indication that Putin is ready to back away from his conditions for a prospective peace deal, which are fiercely opposed by Kyiv.

Zelenskyy even while agreeing to work on the limited ceasefire said Putin is not seriously pursuing peace talks, and wants to prolong the war until he is in a stronger position.

The White House also confirmed that technical experts from the U.S., Ukraine and Russia would gather in Saudi Arabia in the coming days to discuss implementing the partial ceasefire.

It was not immediately clear if the U.S. would meet together or separately with the Ukrainian and Russian officials. Waltz spoke with his Russian counterpart, Yuri Ushakov, on Wednesday to discuss the coming talks.

Shortly after the call between Trump and Putin on Tuesday, air raid sirens sounded in Kyiv, followed by explosions as residents took shelter.

Despite efforts to repel the attack, several strikes hit civilian infrastructure, including two hospitals, a railway and more than 20 houses, Zelenskyy said. Russian drones were reported over Kyiv, Zhytomyr, Sumy, Chernihiv, Poltava, Kharkiv, Kirovohrad, Dnipropetrovsk, and Cherkasy regions.

The Russian Defense Ministry said its military had launched seven drones at power facilities related to the military-industrial complex in Ukraine’s southern Mykolaiv region, but that it shot them down after receiving Putin’s order to not hit energy infrastructure.

Moscow accused Ukraine of targeting its energy facility in the Krasnodar region bordering the Crimean Peninsula, which Russia annexed in 2014, several hours after the Putin and Trump talks. The ministry said three drones targeted oil transfer equipment that feeds the Caspian Pipeline Consortium, causing a fire and leading one oil tank to lose pressure.

“It is absolutely clear that we are talking about yet another provocation deliberately concocted by the Kyiv regime, aimed at derailing the peace initiatives of the U.S. president,” the Russian Defense Ministry said.

Related Story: Trump Hits ‘Pause’ on US Aid to Ukraine After Oval Dustup, Pressuring Zelenskyy on Russia Talks

Russia said its air defenses intercepted 57 Ukrainian drones over the Azov Sea and several Russian regions — the border provinces of Kursk and Bryansk and the nearby regions of Oryol and Tula.

Zelenskyy said that “words of a ceasefire” weren’t enough.

“If the Russians don’t hit our facilities, we definitely won’t hit theirs,” Zelenskyy said.

Meanwhile, the two combatants said Wednesday that they had each swapped 175 prisoners in one of the largest exchanges of the war.

Zelenskyy rejected Putin’s key condition that Western allies stop providing military aid and intelligence to Ukraine. He said doing so would endanger lives if citizens were blind to incoming air raids and lead to the continuation of the war.

“I don’t think anybody should make any concessions in terms of helping Ukraine, but rather, assistance to Ukraine should be increased,” Zelenskyy said. “This will be a signal that Ukraine is ready for any surprises from the Russians.”

Zelenskyy said one of the most difficult issues in future negotiations would be the issue of territorial concessions.

“For us, the red line is the recognition of the Ukrainian temporarily occupied territories as Russian,” he said. “We will not go for it.”

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Samya Kullab and Yehor Konovalov in Kyiv; Dasha Litvinova in Tallinn, Estonia; Geir Moulson in Berlin; Aamer Madhani and Zeke Miller in Washington; and Brian Melley and Susie Blann in London contributed to this report.

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Follow the AP’s coverage of the war at https://apnews.com/hub/russia-ukraine