Ministers from nine NATO countries have called on the US to strengthen its borders with Ukraine by sending them air defense systems, Romanian Foreign Minister Bogdan Aurescu said on the NTV channel, Report informs.

“We must work to increase the US presence in our region on the eastern flank in terms of troops and equipment,” he said.

Ministers from Bulgaria, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania and Slovakia called on the US to strengthen its border territories.