TEHRAN - Iran's Parliament Speaker Mohammad Baqer Qalibaf said on Monday that the country's armed forces are ready to give a "lesson-teaching" response to any aggression.

His remarks on social media platform X came after US President Donald Trump on Monday dismissed Iran's Sunday response to a US proposal, warning that the ceasefire between the two countries is "on massive life support."

"Our armed forces are ready to give a lesson-teaching response to any aggression," Qalibaf said, stressing, "We are ready for all options. They will be surprised."

Iran sent its response to the latest US proposed text for ending the war to the Pakistani mediator on Sunday.

Elaborating on Iran's peace proposal at a weekly press conference on Monday, Iranian Foreign Ministry spokesman Esmaeil Baghaei said the country has solely demanded its people's "legitimate" rights in it.

Baghaei added that ending the war in West Asia, stopping US "maritime piracy" against Iranian ships in the form of a naval blockade, releasing the assets belonging to Iran's people that have been blocked in foreign banks for years, ensuring safe traffic in the Strait of Hormuz, and establishing peace and security in the entire region are not "excessive demands."

Meanwhile, Iran's atomic chief said on Monday that the country's nuclear technology and uranium enrichment are non-negotiable, the official news agency IRNA reported.

"The issue of nuclear technology is not on the agenda of the negotiations (with the United States), and enrichment is non-negotiable," Mohammad Eslami, head of Iran's Atomic Energy Organization, was quoted as saying in the report.

Iran, the United States, and Israel reached a ceasefire on April 8 after 40 days of fighting that started with US-Israeli joint attacks on Tehran and other Iranian cities on Feb 28.

Following the truce, Iranian and US delegations held one round of peace talks in Pakistan's capital Islamabad on April 11 and 12, which failed to yield an agreement.

Over the past weeks, the two sides have reportedly exchanged several proposed plans outlining conditions for ending the conflict through Pakistan.