President Joe Biden told his Ukrainian counterpart Volodymyr Zelenskyy that the United States will deliver a small number of long-range missiles, three U.S. officials and a congressional official familiar with the discussions told NBC News on Friday.
The officials were not authorized to speak publicly and did not provide details on the timeline.
Ukraine says long-range missiles, particularly the Army Tactical Missile System, will give it an important boost in its difficult counteroffensive. However, the U.S. has delayed a decision both over supply shortages and concerns over the potential for an escalation in frontline fighting with Russia.
Meanwhile, Zelenskyy arrived in Canada in the next leg of his North American trip, where he will address the Canadian Parliament and meet members of the local Ukrainian community.
Zelenskyy is expected to ask Prime Minister Justin Trudeau, a staunch ally of Ukraine, for further aid.
"We will sign important bilateral documents that will strengthen our economic ties," Zelenskyy wrote on social media platform X of his Canada trip.
Military support for Ukraine is starting to wane elsewhere, with Poland dealing a serious blow on Thursday in saying it will no longer supply its neighbor with weapons, as a rift over agricultural exports deepens.