US President Joe Biden said he doesn't plan to ship any rockets to Ukraine that could reach Russian territory.
"I won't send anything that can fire into Russia," Biden said at the White House on Monday when asked whether he was planning to send long-range rockets to Ukraine.
CNN reported last week the Biden administration is preparing to step up the kind of weaponry it is offering Ukraine by sending advanced, long-range rocket systems that are now the top request from Ukrainian officials.
The administration is leaning toward sending the systems as part of a larger package of military and security assistance to Ukraine, which could be announced as soon as next week.
The administration has wavered on whether to send the systems amid concerns raised within the National Security Council that Ukraine could use the new weapons to carry out offensive attacks inside Russia, according to officials.
On Friday, after CNN first reported the news, Russians warned that the United States will “cross a red line” if it supplies the systems to Ukraine.
More background: The rocket systems the Biden administration is preparing to send to Ukraine are capable of firing different kinds of ammunition that reach a range of distances.
While some of the longer-range weapons can fire 300 miles (or about 500 kilometers) or more, the systems can also launch rockets with a range of just a few dozen miles — not considered long-range weapons but still able to reach a greater distance than the howitzers the US has already sent to Ukraine.
Biden's comments Monday leave open the possibility that the US could send the advanced, long-range rocket systems without the longest-range rockets.
CNN's Oren Liebermann and Alex Marquardt contributed reporting to this post.