KYIV, Ukraine — Russia held back Monday from launching a new round of strikes that have been expected against power stations and other key infrastructure in Ukraine, as officials warned a lingering energy and water crisis from earlier attacks could prompt more evacuations from the capital.

Ukrainian Foreign Minister Dmytro Kuleba, hosting the largest delegation of top foreign officials since Russian President Vladimir Putin ordered a Russian invasion of Ukraine over nine months ago, insisted that better air defenses were needed from allies “to break this vicious cycle” of Russian air strikes followed by Ukrainian rebuilding of damaged infrastructure.

“Every time we will be restoring it, the Russians will be destroying it,” he told counterparts from seven Baltic and Nordic countries.

The foreign ministers from Estonia, Latvia, Lithuania, Iceland, Sweden, Norway and Finland pledged more military, economic and humanitarian aid as an energy crisis deepens and Ukrainian forces seek to move on with a counteroffensive against Russian troops.

Sweden said it had provided a 270-million-euro ($279 million) package of air defense systems, ammunition, all-terrain vehicles and personal winter gear for troops. Finland pledged to take in more Ukrainian refugees. In Washington, White House National Security Council spokesman John Kirby said the U.S. is working with partners and allies to provide energy and water replacement equipment to Ukraine

In Israel — which has straddled a fine political line in the conflict — Channel 13 reported that a high-level Ukrainian delegation recently visited to discuss an Israeli pledge to provide a system that detects incoming missiles. Israel’s Defense Ministry declined comment.

Israel has voiced support for Ukraine but has refused so far to provide it arms or impose sanctions against Moscow because of its sensitive ties with Russia. Israel’s and Russia’s militaries communicate to avoid conflict in Syria. Israel also does not want to endanger the large Jewish community in Russia.

Ukrainian President Volodymyr Zelenskyy warned late Sunday that Russian troops “are preparing new strikes, and as long as they have missiles, they won’t stop.” He met Monday with senior government officials to discuss what actions to take.

“The upcoming week can be as hard as the one that passed,” he predicted.

NATO Secretary-General Jens Stoltenberg insisted Putin was intent on using frost, snow and ice to his advantage, not only on the battleground but against Ukrainian civilians.

“President Putin is now trying to use the winter as a weapon of war against Ukraine, and this is horrific and we need to be prepared for more attacks,” he said on the eve of a two-day meeting of NATO foreign ministers — including those who visited Kyiv on Monday — in Bucharest, Romania. “That’s the reason why NATO’s allies have stepped up their support to Ukraine.”