Kyiv says it got "no advance warning" before the missiles hit. Sources say the U.S. may have sat on it.

Ukraine says it received no advance warning from its partners before Russia launched a ballistic missile barrage at Kyiv early Tuesday — and multiple sources familiar with the matter told CBS News the United States may have intentionally withheld the early warning.

According to those sources, American officials told their Ukrainian counterparts the missile-detection system had failed due to "bad weather." Ukrainian officials, speaking anonymously given the sensitivity, told CBS News they did not believe the explanation and accused the U.S. of "playing" with the system. When Russia launched another wave of ballistic missiles around 3 a.m. local time Wednesday, the sources said the U.S. early-warning system appeared to be working again.

The strikes were the ones that left Kyiv and Kharkiv reeling this week: more than 39 ballistic missiles and over 120 attack drones and loitering munitions, primarily targeting energy and critical infrastructure, killing six people and leaving some 600,000 without power, according to President Volodymyr Zelenskyy.

The alleged withholding did not come from nowhere. Earlier this week, the Trump administration threatened to stop sharing intelligence — and to halt European allies' purchases of U.S.-made weapons for Ukraine through the PURL procurement system — if Kyiv did not stop deep strikes against Russian energy infrastructure, a European and a Ukrainian official told CBS News. Separately, The Washington Post reported Wednesday that U.S. intelligence officials warned Ukraine's embassy in Washington that further strikes on Russian energy sites could trigger an immediate halt to all intelligence sharing. That threat, one person familiar with the matter said, remains in place, though intelligence has not been fully cut off.

Trump has denied cutting Kyiv off. Asked Tuesday whether the U.S. had stopped sharing intelligence with Ukraine, he said: "No, we haven't. We help them, but we're really helping them get to a final answer. We want the war ended." Zelenskyy has said Kyiv received warnings and threats over intelligence cooperation, but that they had not yet been carried out.

There is also a Starlink wrinkle. Ukrainian officials and soldiers told CBS News that Ukraine's military began experiencing difficulties Tuesday night and Wednesday morning with Starlink, the satellite system Ukrainian forces rely on for communications and strikes. Sources in Ukraine's Defence Ministry told CBS that SpaceX "unilaterally restricted the operation of Starshield terminals ('military package') while in motion" on the night of Oct. 14, without warning. The ministry says it is now in contact with the United States, SpaceX and NATO partners.

The dispute puts Western backers in an awkward spot. Canada is among the countries that have supplied Ukraine with military and financial aid throughout the war, and Ottawa has tied its support to Ukraine's ability to defend its cities. If U.S. intelligence warnings become conditional, the burden on European and Canadian support grows — even as Canada manages its own trade-war strains with Washington.

Trump has said Russia and Ukraine agreed to an "energy ceasefire" halting strikes on energy infrastructure. Ukraine says it has suspended its strikes on Russian energy sites, while accusing Moscow of continuing large-scale attacks on Ukrainian power facilities. Whether intelligence keeps flowing may now depend on whether Kyiv holds its fire — and whether Moscow does.