Iranian gunship aims at US helicopter in HormuzUS labels provocation as unsafe and unprofessional as Iran terms US behaviour improperImage Credit: AFPIranian warship Alborz, is seen in the Strait of Hormuz. Tehran has threatened to close the waterway to U.S. and allied vessels.Published: 16:00 November 29, 2016 Reuters SMALLMEDIUMLARGEWashington: An Iranian Islamic Revolutionary Guard vessel pointed its weapon at a US military helicopter in the Strait of Hormuz on Saturday, two US defense officials told Reuters on Monday, an action they described as “unsafe and unprofessional.” The incident is the latest in a series of similar actions by Iranian vessels this year, but the first reported since Donald Trump won the US presidential election earlier this month.During his campaign, Trump vowed that any Iranian vessel that harassed the US Navy in the Gulf would be “shot out of the water,” if he was elected. Trump is due to take office on January 20.There was no immediate Iranian comment on the incident.The officials, speaking on the condition of anonymity, said the incident took place when a Navy MH-60 helicopter flew within less than a kilometre of two Iranian vessels in international waters. One of the vessels pointed a weapon at the helicopter, the US officials said.“The behaviour is provocative by our standards, and could be seen as an escalation,” the officials said. At no point did the crew of the helicopter feel threatened, they added.Years of mutual animosity eased when Washington lifted sanctions on Tehran in January after a deal to curb Iran’s nuclear ambitions. But serious differences still remain over Iran’s ballistic missile programme, and over conflicts in Syria and Iraq.A number of similar incidents have taken place this year.In September, a US Navy coastal patrol ship changed course after an Iranian fast-attack craft came within 91 metres of it.“When they circle our beautiful destroyers with their little boats and they make gestures at our people that they shouldn’t be allowed to make, they will be shot out of the water,” Trump said at the time.