Iran summoned Kuwait's envoy in Tehran on Saturday to protest about Kuwaiti officials meeting a representative of a "terrorist group" and hosting an "anti-Iranian" meeting, Iran's foreign ministry said in a statement on its website.
The ministry did not provide any more details about the group concerned or about which Kuwaiti officials had met the group's representative.
Iran's state-sponsored Mehr news agency reports that Speaker of Kuwaiti Parliament Marzouq al-Ghanim met with a member of an Iranian ethnic Arab leader group of al-Ahwaz (Ahvaz) movement, which seeks secession from Iran.
Iran's southwestern oil-rich province of Khuzestan is home to many Arab-Iranians where in recent months there have been fierce protests against the government. Although, most of the protesters simply oppose the Islamic Republic government, some Arab speakers demand ethnic rights and even secession.
In September 2018, armed militants attacked a military parade in Ahvaz, the capital of Khuzestan killing 25 people, some soldiers. Iran accused Gulf Arab states of being behind the terror attack.
"These kinds of actions are clear interference in the internal affairs of the Islamic Republic of Iran and a violation of the principle of good neighborly relations and friendly statements from Kuwaiti officials," the Iranian foreign ministry's representative for the Gulf said, according to the statement.