Iran is rapidly expanding its production of enriched uranium, the International Atomic Energy Agency said in its latest report.
The information heightened concern over how soon the Islamic Republic of Iran will have a nuclear weapon at its disposal.
According to the agency, Iran has ramped up its production of higher-grade uranium in the past four months.
The IAEA also claims Iran can't explain or account for some "missing" uranium, enough to use in tests for arming missiles with a nuclear payload.
The report raises significant concern over the goals of Iran's nuclear program, supporting Israeli claims that Iran is using its nuclear program for military purposes, something it has continually denied.
"The IAEA report constitutes additional proof that the State of Israel's assessments are correct," Israeli Prime Minister Benjamin Netanyahu said in a statement released by his office.
"Iran is continuing with its nuclear program without let-up; it is enriching uranium to a high level of 20 percent, while grossly ignoring the demands of the international community," the statement concluded.
Many others are beginning to believe the Islamic Republic is trying to produce an atomic bomb.