The Atacms missiles, with a range of up to 30 miles, are likely to be used against Russian and North Korean forces in the Russian Kursk region, according to officials, among others, The New York Times.
Russia is expected to launch a counteroffensive against Ukraine, which can then use the Atacms missiles to strike Russian and North Korean troop concentrations, logistics nodes, ammunition depots, and supply lines deep inside Russia, the newspaper writes.
Requested for a long time
The decision comes just a few months before President Joe Biden leaves his post to incoming President Donald Trump, who has promised to limit American support to Ukraine and end the war as soon as possible.
Ukraine has long requested the use of donated Western robots to shoot at targets inside Russia.
The US began to relax the rules on the use of American weapons in connection with Ukraine's invasion of Kursk in May. President Joe Biden then allowed Ukraine to use the Himars rocket artillery system, with a range of around eight miles, against Russian forces directly across the border, writes The New York Times.
Russia: Taking measures
Biden announced in mid-September that the US would review the issue of Ukraine being allowed to use American long-range weapons for such purposes.
Russia has in turn warned that such a decision would mean that NATO countries are considered to be at war with Russia.
If that happens, we will, taking into account the changed conflict, take appropriate measures based on the threats we face, said Russian President Vladimir Putin in mid-September.
The White House has not yet commented on the reports.