This was stated at a briefing of the ATO speaker Andrii Lysenko, Censor.NET reports.
"10 armored Humvees are to arrive in Ukraine today as military aid from the United States to our army. The welcoming ceremony will be attended by President of Ukraine Petro Poroshenko, after which the equipment will be transferred to the Ukrainian military. Ukraine is to receive a total of 230 U.S. armored vehicles," he said.
Advisor to the president of Ukraine Yurii Biriukov confirmed on his Facebook page that first armored Humvees arrived from the United States to Boryspil airport, and posted images of the delivery.