Explosions echoed over an Iranian city on Friday in what sources described as an Israeli attack, but Tehran played down the incident and indicated it had no plans for retaliation – a response that appeared gauged towards averting region-wide war. The limited scale of the attack and Iran’s muted response both appeared to signal a successful effort by diplomats who have been working round the clock to avert all-out war since an Iranian drone and missile attack on Israel last Saturday.