Brent oil tops $90 as US, Iran expand strikes in the Middle East

An oil pump jack pumps oil in a field near Calgary, Alberta, Canada on July 21, 2014. — Reuters Brent, WTI at over one-month high.Iran’s Guards say two oil tankers ‘exploded’ in Strait of Hormuz.Number of ships transiting the strait stays low over the weekend.SINGAPORE: Oil…