The United States reached deals Tuesday with Ukraine and Russia on a truce in the Black Sea and a pause in attacks on energy facilities, with Washington also pledging to push for the lifting of some financial sanctions against Moscow.The separate agreements are the first formal commitments by the warring sides since the inauguration of Donald Trump, who is pushing for an end to the war and a rapid rapprochement with Moscow that has alarmed Kyiv and European countries.The US agreement with Russia goes further than the agreement with Ukraine, with Washington committing to help seek the lifting of international sanctions on Russian agriculture and fertiliser exports, long a persistent Russian demand.The Kremlin said this would mean restoring links between some Russian banks to the international financial system.Kyiv and Moscow both said they would rely on Washington to enforce the deals.Ukrainian president Volodymyr Zelenskiy said the truce agreements would take effect immediately, and that if Russia violated them he would ask Trump to impose additional sanctions on Moscow and provide more weapons for Ukraine."We have no faith in the Russians, but we will be constructive," he said.He also said Ukraine had not signed on to the US offer to help relieve sanctions on Russia, which was in the US-Russia statement but not in the separate statement agreed with Ukraine."We believe that this is a weakening of position and sanctions," he said.Russian Foreign Minister Sergei Lavrov said: "We will need clear guarantees. And given the sad experience of agreements with just Kyiv, the guarantees can only be the result of an order from Washington to Zelenskiy and his team to do one thing and not the other."The talks in Saudi Arabia followed separate phone calls last week between Trump and the two presidents, Zelenskiy and Vladimir Putin.Putin rejected Trump's proposal for a full ceasefire lasting 30 days, which Ukraine had previously endorsed.Ukrainian Defence Minister Rustem Umerov said Kyiv would regard any movement of Russian military vessels outside the eastern part of the Black Sea as a violation and a threat, in which case Ukraine would have the full right to self-defence.Russia has attacked Ukraine's power grid with missiles and drones throughout the war, arguing that civil energy infrastructure is a legitimate target because it helps Ukraine's warfighting capability.More recently, Ukraine has been launching long-range strikes on Russian oil and gas targets, which it says provide fuel for Russian troops and income to fund its war effort.The Kremlin said the pause in attacks on energy would last for 30 days from March 18, when Putin first discussed it with Trump. Ukraine had said last week that it would accept such a pause only after a formal agreement.Kyiv has been able to reopen its ports and resume exports at around pre-war levels, despite the collapse of a previous UN-brokered Black Sea shipping agreement, but its ports have come under regular air attack. Zelenskiy said the agreement would bar such strikes.Moscow said the agreement would require sanctions relief including restoring links between Russia's agricultural export bank and the SWIFT international payments system. That and other steps could require agreement from European countries.Ukraine and its European allies fear Trump could strike a hasty deal with Putin that undermines their security and caves in to Russian demands, including for Kyiv to abandon its NATO ambitions and give up land claimed by Moscow.