UK Prime Minister Boris Johnson has demanded the “immediate release” of  Nazanin Zaghari-Ratcliffe, a British citizen detained in Iran. In a phone call with Iran’s President Hassan Rouhani, Johnson called the treatment of Zaghari-Ratcliffe “completely unacceptable.” Sky News reports that Downing Street said the Prime Minister had spoken to President Hassan Rouhani on Wednesday afternoon and demanded her immediate release, along with other detained British-Iranian dual nationals.