It's time for the United States to hold Iran accountable.

Iran conducted a ballistic missile test in yet another apparent violation of a United Nations resolution, U.S. officials told Fox News on Monday.

The launch occurred at a well-known test site outside Semnan, about 140 miles east of Tehran, on Sunday.

The Khorramshahr medium-range ballistic missile flew 600 miles before exploding, in a failed test of a reentry vehicle, officials said. Iran defense minister Brigadier Gen. Hossein Dehqan said in September that Iran would start production of the missile.

U.N. resolution 2231 -- put in place days after the Iran nuclear deal was signed -- calls on the Islamic Republic not to conduct such tests. However, this is at least Iran's second such test since July. The resolution bars Iran from conducting ballistic missile tests for eight years and went into effect July 20, 2015.

Iran is "called upon not to undertake any activity related to ballistic missiles designed to be capable of delivering nuclear weapons, including launches using such ballistic missile technology," according to the text of the resolution.

Click here to read more about the violation.