The US has confirmed the arrest of a journalist for Iranian television. The Washington District Court said that Marzieh Hashemi's testimony is required over an unspecified case, but that she is not accused of a crime. <br />''<br />''The court added that Hashemi will be released immediately after the completion of her testimony to a grand jury investigating unspecified violations of US criminal law. <br />''  <br />''Hashemi was arrested on Sunday at the St. Louis airport on a visit to see an ailing family member. Iran has protested the arrest of Hashemi, who is a presenter on Iran's English-language Press TV. <br />''<br />''Although she is an American citizen, Tehran considers Hashemi an Iranian citizen due to her marriage.<br />