Oil prices sank by about one per cent a barrel on Monday after Iran’s weekend attack on Israel proved to be less damaging than anticipated, easing concerns of a quickly intensifying conflict that could displace crude barrels. Brent futures for June delivery fell 91 cents to $89.54 a barrel, a 1pc loss, by 1:17pm EDT (1717 GMT). US crude futures for May delivery fell 87 cents to $84.79 per barre