Iranian Parliament Speaker Mohammad Bagher Qalibaf accused U.S. President Donald Trump of violating a temporary ceasefire on Monday.

The escalation threatens a fragile diplomatic pause in a region already strained by military buildup. If the truce collapses, it could trigger a direct increase in weaponry and combat operations between the two nations.

Qalibaf said the United States is using the ceasefire period to send additional weapons to the region. He said this activity constitutes a breach of the terms agreed upon for the current pause in hostilities.

The current ceasefire has a duration of two weeks [1]. Qalibaf said Iran would respond if the agreement is not upheld by the U.S. administration.

"The United States is violating the ceasefire by sending more weapons," Qalibaf said.

He said the Iranian military is ready to escalate its response on the ground. He said the country has assets and strategies remaining in reserve that have not yet been deployed.

"We are prepared to reveal new cards on the battlefield if the ceasefire ends," Qalibaf said.

The statements come as Tehran monitors U.S. military movements in the region. The Iranian leadership has previously linked its military posture to the actions of the U.S. government, suggesting a proportional response to any perceived provocation.

"The United States is violating the ceasefire by sending more weapons."

This rhetoric signals that the two-week ceasefire is highly unstable. By claiming the U.S. is utilizing the pause for military repositioning, Iran is creating a diplomatic and military justification to resume or escalate hostilities. The mention of 'new cards' suggests that Iran may be preparing to introduce previously undisclosed weapon systems or tactical shifts into the conflict zone.