Iran has denounced U.S. strikes in southern Iran as a sign of “bad faith and unreliability” amid ongoing negotiations to end the war

The attacks in southern Iran prompted Tehran to warn that it would "leave no act of hostility unanswered," complicating negotiations to end the war.

Iran said the U.S. strikes on Iran Monday were a "gross violation" of the fragile cease-fire between the two countries that began on April 8.

Iran said US strikes near the Strait of Hormuz had violated the fragile ceasefire, which started in April. Iran says the US has committed a "gross violation" of the ceasefire with new air strikes it launched on the country in the past 48 hours.

Iran has threatened to retaliate against the U.S. after it launched strikes on Iranian missile sites and vessels on Monday.

A deal appears to be emerging between the United States and Iran to end the war and open the Strait of Hormuz, and U.S. President Donald Trump over the weekend said it had been “largely negotiated.” It is not clear when or how the deal might be finalized and when its various parts will take effect.

The US launched overnight strikes on southern Iran on Monday, endangering a fragile ceasefire as Washington tried to reach a deal to end the war.

The United States has conducted “self-defense” strikes in southern Iran on Monday, targeting missile launch sites and Iranian vessels trying to establish mines, according to U.S. Central Command (CENTCOM).