CIA Director Bill Burns traveled to Ukraine earlier this month to meet with Ukrainian President Volodymyr Zelensky and other officials.
His visit comes as the war appears to be entering its second year, according to two sources familiar with the trip.
“While there, he reinforced the US pledge to provide support to Ukraine in its fight against Russian aggression, including continued intelligence sharing,” a US official said.
However, the sources declined to provide further details about the trip.
Burns’ trip comes as the US is increasingly concerned that Russia could return to using a nuclear weapon after difficulties during its war in Ukraine.
Burns and other US officials have said publicly that they see no evidence that Moscow is actively preparing to take such a step, but officials familiar with the intelligence warn that the risk is perhaps the highest it has been since the aggression began. in February.