The discussions include an option for Ukraine ‌to build some components for final assembly elsewhere in Europe, the sources added. Zelenskiy had warned on Saturday that his country had run out of Patriot missiles and that only one of 27 ballistic missiles fired by Russia that day had been shot down. During a meeting with Zelenskiy in Ankara, Turkey, last month, Trump said the US would grant Ukraine a license to manufacture PAC-3s. He told reporters that the US had not agreed to letting Ukraine build Patriot missiles and the US must be "very careful about ‌letting somebody build them". A ​senior administration official said that the US is "exploring several potential pathways for future defence industrial cooperation with Ukraine," adding that any agreement must prioritise the security of US technology.