Senior Biden administration officials have quietly traveled to Caracas in the latest bid to bring home detained Americans and rebuild relations with the South American oil giant as as the war in Ukraine drags on, driving higher gas prices and forcing the U.S. to recalibrate other foreign policy objectives.

A State Department spokesperson described the trip as a welfare visit focused on the safety of several U.S. citizens detained in Caracas, including a group of oil executives from Houston-based Citgo jailed more than four years ago.

It includes Roger Carstens, the special presidential envoy on hostage affairs, as well as Ambassador James Story, who heads the U.S. government’s Venezuelan Affairs Unit out of neighboring Colombia

It's unclear what else the U.S. officials are seeking to accomplish during the mission.

But it follows a surprise visit in March by the two men and Juan Gonzalez, the National Security Council director for the Western Hemisphere, that was the first White House trip to the county in more than two decades.

Since then, both the Biden administration and Venezuela's socialist government have shown a willingness to engage after years of hostilities between Washington and Caracas over President Nicolás Maduro's 2018 re-election, which was marred by irregularities.

First, Maduro freed two Americans as a goodwill gesture and promised to return to negotiations in Mexico with the U.S.-backed opposition.

Although those talks have yet to resume, the U.S. then renewed a license so that oil companies including Chevron can continue to operate in the OPEC nation, which has been under tight sanctions since 2019.

Then earlier this month the White House lifted sanctions imposed in 2017 targeting the nephew of First Lady Cilia Flores, who at the time was accused of facilitating corruption while a top official at state run oil giant PDVSA.