The United States said on Monday possible membership for Ukraine and Georgia will be decided by all members of the organization but not by the United States.
"In terms of what NATO decisions will be taken, obviously that's something that's not determined by the United States but by all of the members of NATO," State Department deputy spokesman Tom Casey said at a briefing.
"But certainly those decisions will be made based on whether countries have met the qualifications and criteria, either for membership, in some cases, or to engage in a closer relationship through a membership action plan, and others," Casey said.
The United States has voiced support for NATO membership for Ukraine and Georgia.
NATO will hold a summit meeting next month in Romanian capital of Bucharest and both Ukraine and Georgia hope to join the military alliance at the summit.