sentences:  The operation took relatively heavy toll, most likely because the raiding team was late in arriving at the target, meaning the British were already on high alert.A Lehi unit launched a sabotage operation against the oil refinery in Haifa, but the explosives detonated prematurely as they were being carried, killing the Lehi member carrying them.Severe damage was caused to the facility, but the oil tanks, which were the intended target, were left untouched.