New Delhi | Left parties on Sunday condemned the US strikes on nuclear sites in Iran, terming them as a "grave violation" of international laws.

Communist Party of India (Marxist) general secretary MA Baby warned that the fallout of the strikes will be global, including for India.

"We unequivocally condemn the US attack on Iran's nuclear sites - a grave violation of international law. Trump ordered this strike ignoring US intelligence that Iran is not pursuing nuclear weapons," Baby said in a post on X.

"This mirrors the Iraq war lies - lies about WMDs (Weapons of Mass Destruction) then and nukes now. The economic & political fallout will be global, including for India," he said.

"The US has proved itself to be the No. 1 Rogue State. Call for Protest action wherever possible," he added.

Communist Party of India (Marxist-Leninist) Liberation General Secretary Dipankar Bhattacharya said the peace-loving people of the world must condemn this blatant act of US aggression.

"The US has now directly attacked Iran. After destroying Iraq, Libya and Syria, the US-Israel axis of aggression wants to destroy Iran and destabilise and subjugate the whole of West Asia," Bhattacharya said in a statement.

"The peace-loving people of the world must condemn this blatant act of US aggression. India must not support the US-Israel axis in this totally unjust war and demand an immediate end to imperialist invasion of Iran," he said.

The United States bombed three nuclear sites in Iran overnight. US President Donald Trump has warned of additional strikes if Iran retaliates