WASHINGTON, March 8 (Reuters) - Venezuela released at least one jailed U.S. citizen on Tuesday, three people familiar with the matter said, in an apparent goodwill gesture toward the Biden administration following a visit to Caracas by a high-level U.S. delegation.

The weekend meetings focused not only on the fate of Americans held in Venezuela but on possibly easing U.S. oil sanctions on the OPEC member, a close Russian ally, to fill the supply gap once President Joe Biden banned Russian oil imports in response to Moscow's invasion of Ukraine.