War risk underwriters are deliberating whether to charge tonnage with Israeli links a higher rate following the attack on a tanker off Oman earlier this week.

Ships trading to high-risk additional premium areas, such as the coast of Oman close to where the attack on the 49,000-dwt Mercer Street (built 2013) took place, would be normally paying higher rates.

But, amid rising tensions in the region, and following a series of attacks by Israel and Iran on ships, some underwriters said they are reviewing their exposure tonnage with links...