Six other Americans detained in Venezuela in the months after the country’s July presidential election were freed by the government of President Nicolás Maduro after he met Grenell in February.

The family of Joseph St. Clair confirmed his release. The move comes as the United States threatens to choke off Venezuela’s critical oil revenue.

A United States Air Force veteran detained for several months in Venezuela was released Tuesday, according to a family statement. Joseph St. Clair, who the U.S. government has said was wrongfully detained in the South American country,