The United States has urged Nigeria to release a senior executive of Binance, the world's largest cryptocurrency exchange. US Ambassador to the UN Linda Thomas-Greenfield met with Nigeria's Minister of Foreign Affairs at the UN General Assembly in New York this week and stressed that the detention of Tigran Gambaryan is a critical issue in US-Nigeria relations. She urged his immediate release. Earlier, the US House Foreign Affairs Committee passed a resolution calling for Gambaryan's release. The resolution now goes to the full House for a vote. Gambaryan was arrested in Nigeria in December 2021 on charges of operating an unlicensed money transfer business. He has denied the charges and says he is being held as a political prisoner. Binance has said that Gambaryan is a "key member" of its team and that his detention is "unjust." The US is not the only country that has called for Gambaryan's release. The European Union and the United Kingdom have also expressed concern about his detention.