Iran on Monday dismissed US proposals to end the month-long Middle East war as "unrealistic, illogical and excessive."
The nation unleashed further missile strikes on Israel, including targeting infrastructure in Tehran and Beirut. Yemen's Iran-aligned Houthis also launched attacks, raising fears of a second key shipping route being blocked.
President Donald Trump warned Iran to open the Strait of Hormuz-critical for global oil shipments-or risk US attacks on its energy infrastructure, including Kharg Island.
The defiance triggered a major spike in oil prices. Brent crude surged over 2% to nearly $115 a barrel, signaling the market's expectation of further military escalation.
Iranian officials confirmed they are reviewing an exit from the Nuclear Non-Proliferation Treaty, a key point of contention for the US.