Iran's Foreign Ministry Spokesman Nasser Kanaani on Monday warned that any "foolish" move against the country will receive a "crushing response" from Tehran.

He made the remarks at a weekly press conference in the Iranian capital, Tehran, in response to U.S. Senator Lindsey Graham's anti-Iran accusations and remarks on the social platform X.

In a number of posts on X, Graham accused Iran of "being behind the operation against Israel (by Hamas), and aiding the Palestinian resistance groups in it," and threatened Iran with "attacks on its oil refineries and infrastructure."

Kanaani said those who threaten Iran should be aware of the legal and international consequences and responsibilities of their threats, stressing that Iran has always acted "strongly, decisively" in defense of its national security and people's rights.

He noted that as announced by the Palestinian nation and resistance groups, the recent military operation was in response to "frequent moves by Israel in desecration of the Al-Aqsa Mosque" and daily operation by Israel against the Palestinian people.

Kanaani added that the arms and financial support from the United States for Israel are proof of "Washington's direct role in supporting Israel and its crimes against the Palestinian people."

The spokesman reaffirmed Iran's position that it is the Palestinian nation's "legitimate and internationally-recognized" right to resist against "oppressor, aggressor and occupier."

Iran's permanent mission to the United Nations said on Monday the country is not involved in the Hamas military operation against Israel, but "unflinchingly stands in solidarity with the Palestinian nation," according to the official news agency IRNA.

Hamas' recent decisions and measures have "strong roots in the cardinal principle of people's right to self-determination, which is indicative of a completely legitimate response to seven decades of Israel's cruel occupation," said the statement.

Hamas on Saturday launched a surprise attack on Israeli towns adjacent to the Gaza Strip, prompting Israel to launch retaliatory strikes on Gaza. The ongoing conflict has left heavy casualties on both sides.

(With input from Xinhua)

(Cover: File photo of the flags of Iran and the U.S. seen printed on paper. /Reuters)