JERUSALEM/TEHRAN/NEW YORK -- Iran's Press TV said Tuesday that ceasefire begins following waves of Iranian attacks on Israel.

Early Tuesday, Israel's military said it was working to intercept Iranian missiles launched "a short while ago," without specifying the exact time of the attack.

"A short while ago, sirens sounded in several areas across Israel following the identification of missiles launched from Iran toward the State of Israel," the military said in a statement posted on Telegram around 5:00 am local time (0200 GMT). Iran has since fired waves of missiles at Israel, according to Iranian state media.

Israel's skies are closed to planes until further notice, said Israeli airport authorities.

US President Donald Trump had earlier announced that a ceasefire between the two sides would begin around 0400 GMT, with Iran expected to halt its operations first.

Iranian Foreign Minister Abbas Araqchi said earlier that there was no "agreement" on a ceasefire between Iran and Israel. However, he suggested Iran would be prepared to halt further retaliation if Israeli attacks stopped by 4 am Tehran time (0030 GMT).

"If Israel stops its illegal aggression against the Iranian people no later than 4 am, Iran has no intention of continuing its response afterwards," Araqchi wrote in a post on X, adding that "the final decision on the cessation of our military operations will be made later."

Hours earlier, a senior Iranian official told CNN that Tehran had not received any formal ceasefire proposal from the United States and saw no reason to halt hostilities.

"At this very moment, the enemy is committing aggression against Iran, and Iran is on the verge of intensifying its retaliatory strikes, with no ear to listen to the lies of its enemies," the official was quoted as saying. He added that remarks from US and Israeli leaders would be seen as a "deception" intended to justify further attacks on Iran.

The conflicting narratives raised questions about the implementation and durability of any potential ceasefire. As of Monday night, neither Israeli nor Iranian officials had publicly confirmed any agreement. The White House and the Pentagon had also not issued formal statements, and it remained unclear whether the reported deal had been communicated through diplomatic channels, or whether either side intended to follow the terms.

US President Donald Trump announced Monday evening that Israel and Iran have reached a formal agreement to implement a complete and total ceasefire, marking what he called the end of the "12-Day War."

In a post on his Truth Social platform Monday, Trump said the ceasefire will initially last 12 hours, during which the opposing sides will maintain a posture of "peace and respect."

"On the assumption that everything works as it should, which it will," Trump wrote, "I would like to congratulate both countries... on having the stamina, courage, and intelligence to end what should be called 'THE 12 DAY WAR.'"

Calling the agreement a breakthrough that "could have saved the Middle East from years of destruction," Trump ended his announcement with a sweeping message of unity: "God bless Israel, God bless Iran, God bless the Middle East, God bless the United States of America, and GOD BLESS THE WORLD!"