According to the sources, the Pentagon has assessed that the US stockpile of Tomahawk missiles would not be affected by allowing Ukraine access to them.
The final decision will be made by US President Donald Trump, who has previously expressed that the US has its own need for Tomahawks, and cannot "empty" the country.
Neither the White House nor the Pentagon have commented on the information, according to CNN.
Kiev has requested Tomahawk missiles, as they would make it possible to strike further into Russian territory compared to today.
A couple of weeks ago, in connection with a meeting between Donald Trump and Ukrainian President Volodymyr Zelensky, the American president expressed hope that the war could be ended without Tomahawk missiles.
Zelenskyy said after the meeting that he had not lost hope for the long-awaited Tomahawk missiles – despite Trump ducking the demand.
"It's good that President Trump didn't say 'no,' even though today he didn't say 'yes,'" Zelensky said in an interview with NBC News.
Last week, reports emerged that the US had lifted a form of restriction on Ukraine's use of certain long-range missiles supplied by Western allies. This mainly concerned British-made Storm Shadow missiles that are fired from Ukrainian fighter jets with a range of almost 300 kilometers – but not Tomahawk missiles.
