The head of the Israel Defense Forces said Tuesday that “the campaign against Iran is not over” as a ceasefire between the two countries went into effect. President Donald Trump also vowed that Israel will not attack Iran and told Israel to bring its pilots home.

The fragile ceasefire between Israel and Iran appears to be holding after a rocky start, giving rise to cautious hope it could lead to a longer term peace agreement even as Tehran insisted it would not give up its nuclear program.

The ceasefire brokered by U.S. President Donald Trump between Iran and Israel appeared to be holding on Wednesday a day after both countries signalled that their air war had ended, at least for now. Each side claimed victory on Tuesday after 12 days of war,