Iranian media have confirmed that three missing US nationals have been detained by Iranian guards after the three crossed into Iran from Iraq.
The trio were on a walking tour in Iraq's autonomous Kurdish region which borders Iran, Iraqi media reported.
Hours after their arrests, Iranian media confirmed the incident, adding that they were arrested inside Iran.
The Iraq-Iran border is not well delineated. The US embassy in Baghdad said it was investigating.
Iran's state-owned Al-Alam confirmed the arrests, quoting an informed source.
The US state department earlier said: "We are using all available means to determine the facts in this case." LINK