US national security adviser John Bolton arrived in the United Arab Emirates on Tuesday to discuss with officials regional security amid tensions with Iran. “Just landed in the UAE. Looking forward to meeting with our Emirati allies tomorrow to discuss important and timely regional security matters,” Bolton posted on Twitter. Tensions have risen between Iran and the United States following the sabotage of four commercial vessels off the UAE’s port of Fujairah earlier this month. Washington blamed the attacks on Tehran, which denied the accusations. Bolton said last week that the United States had “deep and serious” intelligence on threats posed by Iran, without providing details. Washington has deployed a carrier strike group and bombers and announced plans to deploy 1,500 troops to the Middle East.