The United States is expected to announce in the coming days that it will use offensive and defensive cyber capabilities on behalf of NATO if asked, a senior Pentagon official said, amid concerns about Russia’s increasingly assertive use of its cyber capabilities, Reuters reported.

“We will formally announce that the United States is prepared to offer NATO its cyber capabilities if asked,” Katie Wheelbarger, the principal deputy assistant secretary of defense for international security affairs, told reporters during a trip to Europe by U.S. Defense Secretary Jim Mattis.