Expressing support for the campaign against terrorism, the Foreign Ministry spokesperson noted that it should not involve violation of countries' "national sovereignty".
Marzieh Afkham told IRNA on Sunday, "Any campaign against terrorism should observe the fundamental principles of international law, particularly those related to respecting the national sovereignty of states."
She was responding to a question about Tehran's position on Turkey's airstrikes on Islamic State targets across the border in Syria, which started on Friday without prior coordination with officials of the war-hit country.
"Undoubtedly, any move that undermines the national sovereignty of other states will, in effect, embolden terrorists to continue their brutal crimes," Afkham said.
Reiterating Iran's principled stance, she underscored the necessity of "coordination" with countries before launching any operation within their territories against terrorists.
"We believe the roots of terrorism can be addressed only by cutting off financial, arms and ideological support for terrorists," she said.
"Effective confrontation with terrorism demands comprehensive cooperation among all governments and we believe any laxity in the fight against terrorists will encourage them to heighten their inhumane acts."
Prime Minister Ahmet Davutoglu said Turkish planes did not violate Syrian airspace. He denied news reports claiming that Turkey had told the Syrian government about the airstrikes, but said it had contacted NATO allies before the operation, the Associate Press reported.
Turkey, which straddles Europe and Asia and borders the Middle East, had long been reluctant to join the US-led coalition against IS militants.
In a related, long-awaited development, following months of US appeals and delicate negotiations, Turkey said it has agreed to allow US-led coalition forces to base manned and unmanned aircraft at its air bases for operations targeting the IS group.
Along with continued attacks on Islamic State militants in Syria, Turkish fighter jets and ground forces hit Kurdistan Workers Party camps in Iraq on Saturday, in a campaign Ankara said would help create a "safe zone" across swathes of northern Syria.
Turkish police also launched a major operation on Friday against groups they called extremist, detaining more than 290 people in simultaneous raids in Istanbul and 12 provinces.
In June 2014, the Islamic State group launched a blitz, capturing large parts of Iraq and of Syria — which has been ravaged by a four-year-old civil war. The group subsequently declared an Islamic caliphate on the territory it controls. The US-led coalition has been striking the group in both Syria and Iraq.
