The U.S. military on Wednesday released six Iranians who work for Tehran's power ministry, a day after American soldiers detained the delegation in Baghdad, Yassin Majid, an aide to Iraq's prime minister, told CNN. U.S. military forces escorted the Iranians to Iraqi Prime Minister Nuri al-Maliki's office after their release at 7 a.m. (11 p.m. ET Tuesday), said Iran's ambassador in Baghdad, Hassan Kazemi Qomi, according to Iran's official news agency IRNA on Wednesday. The U.S. military was not immediately available for comment. Their release came a day after IRNA reported that U.S. soldiers arrested members of an Iranian government delegation at a hotel in eastern Baghdad and took them to an unidentified location. According to Majid, the delegation was in the capital at the invitation of Iraqi government officials to sign an electricity supply contract.