Iran has released four Kuwaitis arrested several days ago in the Islamic republic's southwestern region, Kuwait's deputy foreign minister said on Monday.
Cited by the official KUNA news agency, Khaled al-Jarallah said the four were handed over to the Kuwaiti embassy in Tehran and will return to the emirate on Tuesday.
Kuwait summoned the Iranian ambassador on Friday and demanded the release of its four citizens who had been detained in the Ahvaz area.
It was not clear when they were arrested. Local media said the four had been hunting in Iran.
Kuwait recalled its ambassador from Tehran in January after relations were broken off between Gulf Sunni heavyweight Saudi Arabia and Shia-dominated Iran following attacks on the kingdom's missions.
A Kuwaiti and an Iranian were sentenced to death in January by a court in Kuwait for spying for Iran and Lebanon's Shia group Hezbollah.