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.

After twelve days of intense strikes between Israel and Iran – punctuated by the United States’ bombing of Iranian nuclear sites over the weekend and Tehran’s performative retaliation – a US-brokered ceasefire appeared to be holding on Tuesday.

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.