President Trump said Tuesday that a ceasefire between Israel and Iran was "in effect," and it appeared to be holding on Tuesday afternoon after 12 days of deadly conflict between the Middle East's arch rivals.

In a 48-hour whirlwind, President Donald Trump went from elated to indignant to triumphant as the fragile Israel-Iran ceasefire agreement came together, teetered toward collapse and ultimately coalesced.

President Donald Trump called Israeli Prime Minister Benjamin Netanyahu on Tuesday and asked him not to send an immediate military strike in response to what Israel said was Iran’s violation of the ceasefire, said a person familiar with the exchange, who spoke on the condition of anonymity in order to discuss sensitive communications.