The Secretary of the Supreme National Security Council (SNSC) Rear Admiral Ali Shmakhani made the comments in a tweet on Thursday.

"The United States' response to Iran's principled proposals, its unacceptable proposals, and its insistence on being in a hurry to reach an agreement under nonsense excuses show that the United States has no will to reach a strong and defensible agreement with the parties," Shamkhani wrote in a tweet on Thursday.

"The Vienna talks are becoming more complicated every hour without a political decision by the United States," the top Iranian security official added.