State Department confirmed Thursday that a $400 million cash shipment to Iran in January was tied to the release of four American citizens who’d been detained in the country.

American Pastor Saeed Abedini was arrested and charged with undermining Iranian security through religious meetings. He was recently released with others in Iran. Abedini’s story is an example of the growing Christian movement within predominantly Muslim Iran.

Source: State Dept.: $400M cash shipment to Iran tied to U.S. prisoners’ release