Iran's Revolutionary Guards on Thursday warned against any crossings of the Strait of Hormuz without authorization, saying vessels not complying "will be dealt with.” The future of the strait, a vital route for energy shipments that was blockaded by Iran during the war, is a key sticking point in negotiations between Tehran and Washington. Tehran has said it plans to impose what it calls maritime service fees, as opposed to tolls, while the United States argues it is an international waterway and therefore should not be charged. "The only authorized route for passage through the Strait of Hormuz is the route announced by the Islamic Republic of Iran," said the Revolutionary Guards, the ideological arm of Iran's military. Any crossing without authorization is "unacceptable and extremely dangerous,” they warned in a statement. According to AFP, they also denounced what they said was a new route through the waterway announced by "certain authorities.” The statement did not elaborate but it appeared to be a response to an announcement overnight of a temporary corridor by Oman, which also borders the strait.