By Steve Holland and Simon LewisCAMP DAVID, Maryland, July 31 (Reuters) - President Donald Trump said on Friday that the United States has not agreed to Ukraine building Patriot missiles but that talks are ongoing, adding that the U.S. President Donald Trump said on Friday that the United States has not agreed to Ukraine building Patriot missiles but that talks are ongoing, adding that the U.S. Key points and original sources are listed below.

• By Steve Holland and Simon LewisCAMP DAVID, Maryland, July 31 (Reuters) - President Donald Trump said on Friday that the United States has not agreed to Ukraine building Patriot missiles but that talks are ongoing, adding that the U.S. must be "very careful ab...S1

• President Donald Trump said on Friday that the United States has not agreed to Ukraine building Patriot missiles but that talks are ongoing, adding that the U.S. must be "very careful about letting somebody build them."S2