Khamenei referred to Trump's remarks that "If they don't make a deal, there will be bombing...the likes of which they have never seen before."
The report comes amid contact between the Islamic Republic and the US over reported efforts to reach a nuclear deal.
Tehran reiterated its stance on not negotiating directly while under pressure, but is open to indirect talks, Araghchi was reported as saying.
What a beautiful image it is – when the embassies of Israel and the United States once again raise their flags in free Tehran.
Trump pushes for a new nuclear deal with Iran to avoid military action, but Khamenei rejects talks, calling it a deception as US sanctions pressure Tehran.
Marking the Iranian New Year, Pahlavi said that Iran without the Islamic Republic would contribute to "regional stability, global security, and economic growth."
Prosecutors said Rafat Amirov and Polad Omarov were to be paid $500,000 by Iran for the assassination.
"This matter concerns the entire Islamic people," he added. "The Islamic Ummah should set aside their differences on various issues, and stand united against Zionist regime’s crimes in Gaza."
MIDDLE ISRAEL: As Jews marked Purim, Iran’s Khamenei denied the Holocaust, echoing past enemies. History proves one thing: Jews remember, and those who seek to erase them never prevail.
Khamenei told a group of university students that Trump's offer for talks was "a deception aimed at misleading public opinion."