President Donald Trump on Monday announced that Israel and Iran had agreed to a ceasefire, after more than a week of fighting following Israel's strikes -- and subsequent U.S. attacks -- on Iran's nuclear program.

Israeli Prime Minister Benjamin Netanyahu welcomed the ceasefire with Iran unveiled by President Donald Trump and said he had agreed to it, but warned his country would "respond forcefully to any violation.

A fragile ceasefire between Iran and Israel appeared to hold Tuesday after initially faltering, and U.S. President Donald Trump expressed frustration with both sides, saying they had fought “for so long and so hard” that they do not know what they are doing.