The US State Department on Monday issued an alert urging American citizens around the world to “exercise increased caution” over the war with Iran.The alert said that “due to heightened tensions in the Middle East, the security environment remains complex with the potential for unforeseen escalation.”For all the latest headlines, follow our Google News channel online or via the app.“Americans outside the Middle East should reconsider travel to and through the region,” it said, while warning of the heightened possibility of attacks targeting US diplomatic facilities “or at locations associated with the United States and Americans throughout the world.”The Middle East war resumed after a weeks-long lull prompted by an agreement signed in June, and oil prices surged to a one-month high as the foes battled to control the vital Strait of Hormuz.As its truce with the US collapsed, Tehran reimposed its blockade of the waterway, while Washington hit back by again blockading Iran’s ports.With AFP