The United States is sending another 2,000 Marines to the Middle East while deploying a third aircraft carrier and a second Marine expeditionary unit to the region.A US official told Al Jazeera about the latest deployment.According to the official, the USS Theodore Roosevelt left San Diego on Sunday as part of efforts to strengthen the US military presence under the Central Command (CENTCOM) in the Middle East.Meanwhile, an oil tanker came under attack in the strategically important Strait of Hormuz.Al Jazeera reported the incident during its live coverage of the Iran war. The broadcaster said the increased US military presence in the Middle East and the tanker attack in the Strait of Hormuz were among the latest developments in the ongoing conflict involving Iran.