An Iranian semi-official news agency is reporting the country has confirmed it is detaining an unspecified number of Slovak nationals, saying they have broken the law.

The Sunday report by ISNA quotes Abbas Araghchi, spokesman of Iran's foreign ministry, as saying the Slovaks entered Iran as tourists, "but they had unconventional behavior and instruments. They violated Iran's law."

Araghchi said the case is under judicial investigations and would later be sent to the courts. He said Slovak diplomats have access to the detainees.

Iran did not identify the detainees or give any detail on their numbers.

In February Iran released a Slovak national after weeks after accusing him of spying for the CIA.