Germany's Foreign Minister Heiko Maas urged Washington to reconsider its decision to withdraw from the Open Skies Treaty.
"I deeply regret the announcement," Maas said, adding that "we will work with our partners to urge the U.S. to consider its decision".
He noted that Germany, France, Poland and Britain had repeatedly explained to the U.S. that the problems with the Russians in recent years "did not justify" pulling out.
The treaty "contributes to security and peace in almost all of the northern hemisphere," the AFP cited Maas as saying.
"We will continue implementing the treaty and do everything to preserve it," Maas said, adding he was coordinating closely with his European colleagues.
