Such restrictions do not apply to domestically produced arms, some of which are reportedly capable of striking deep into Russia.When asked how Ukraine could win the war if there are restrictions from the U.S. on strikes inside Russia, Brink said that this position has remained unchanged since the beginning of the full-scale invasion."The first part of helping Ukraine defend itself is supplying our weapons and those of our partners to support the efforts of your brave heroes on the front lines to return your territories," the ambassador said."Our position from the beginning has been that we do not enable or encourage the use of our weapons in Russia, outside Ukraine's territory."Some of Ukraine's allies have sent weapons to Kyiv with no restrictions on strikes inside Russia, according to Latvian Foreign Minister Baiba Braze.U.K.