This was reported by RBK-Ukraine citing Kellogg on social media X. It is also mentioned by Kontrakty.UA.
According to Kellogg, he had a "long and productive" day in Kyiv with the leadership of Ukraine.
"Great and positive discussions with President Volodymyr Zelensky, the leader of a fighting nation, a courageous leader, and his talented national security team," added the U.S. special representative.