You're about the closest one to right here, the US officially always has had "no comment" on matters of nuclear weapon deployment.
Romania has had 12 F-16's for only two years and two F-22's stationed for four months, plus no secure facilities for nuclear weapons, so I would bet they're not in Romania.
“plus no secure facilities for nuclear weapons”
There are only a few secure nuke storage facilities in Europe. They are well known.