UKMTO has received a report of an incident 78NM northeast of Al Jubayl, Saudi Arabia.The Master of a tanker has reported being attacked by an RPG from a small boat, resulting in damage to the aft port quarter. Crew are accounted for and reported safe. A complete damage assessment and environmental impact are unknown at time of report.Vessels are advised to transit with caution and report any suspicious activity to UKMTO,whilst authorities investigate.