KYIV, Ukraine (AP) — Russia took aim at Western military supplies for Ukraine with airstrikes in Kyiv on Sunday that it said destroyed tanks donated from abroad, as President Vladimir Putin warned that any Western deliveries of long-range rocket systems to Ukraine would prompt Moscow to hit “objects that we haven’t yet struck.” The cryptic threat of a military escalation from the Russian leader didn’t specify what the new targets might be, but it comes days after the United States announced plans to deliver $700 million of security assistance for Ukraine that includes four precision-guided, medium-range rocket systems, helicopters, Javelin anti-tank weapon systems, radars, tactical vehicles, spare parts and more. Military analysts say Russia is hoping to overrun the embattled eastern Donbas region, where Russia-backed separatists have fought the Ukrainian government for years, before any weapons that might turn the tide arrive. The Pentagon said earlier this week it will take at least three weeks to get the precision U.S. weapons and trained troops onto the battlefield. Russian forces pounded railway facilities and other infrastructure early Sunday in Kyiv, which had previously seen weeks of eerie calm. Ukraine’s nuclear plant operator, Energoatom, said one cruise missile buzzed the Pivdennoukrainsk nuclear plant, about 350 kilometers (220 miles) to the south, on its way to the capital — citing the dangers of such a near miss.