Iran's Khatam al-Anbiya Central Headquarters said in a statement posted Saturday on Telegram that the Strait of Hormuz has been closed to vessel traffic, accusing the United States of violating the recently negotiated memorandum of understanding intended to end the U.S.-Iran war and restore maritime access through the strategic waterway.

The statement, which was also circulated by Iran's Tasnim News Agency Telegram channel, said the move was a response to what it described as America's "bad faith and blatant breach" of the agreement as well as continued Israeli military operations in southern Lebanon.

"From this moment," the statement said, "the Strait of Hormuz will be closed to vessel traffic."

The command said the closure was the "first step" in response to what it called violations of the agreement and warned that additional measures could follow if the United States and Israel do not fulfill their commitments.

"In view of America's bad faith and blatant breach of the first clause of the war-ending memorandum of understanding, and in reaction to the relentless and continuous violation of the ceasefire by the Zionist regime in southern Lebanon," the statement said, the waterway would be closed.

The announcement threatens one of the central pillars of the U.S.-Iran memorandum of understanding reached earlier this month.

The agreement was intended to reopen the Strait of Hormuz, one of the world's most important energy shipping routes, while establishing a 60-day framework for negotiations over Iran's nuclear program, sanctions relief, and broader regional security issues.

The Iranian military statement specifically cited continued tensions in southern Lebanon, alleging that Israeli forces had failed to withdraw from territory covered by ceasefire arrangements and accusing Israel of continuing military operations in the area.

The Strait of Hormuz connects the Persian Gulf to the Gulf of Oman and serves as a critical transit route for global oil and liquefied natural gas shipments.

Energy analysts have long warned that any disruption to traffic through the narrow waterway could have significant consequences for international energy markets and global trade.

The statement appeared to signal growing friction surrounding implementation of the U.S.-Iran agreement.

Iranian officials and military leaders have issued increasingly sharp warnings in recent days regarding what they describe as failures by Washington and its regional allies to uphold commitments made under the accord.

The command warned that additional measures could follow if what it called "continued aggression" persists.

"It is noted that this is the first step in response to the enemy's breach of covenant," the statement said.

"In the event of continued aggression, subsequent steps will be planned and taken to compel the enemy to fulfill its commitments," the statement said.