Jan 6, 2007, a news agency reported that Israeli military sources had revealed a plan to strike the enrichment plant at Natanz using low-yield nuclear "bunker-busters." The disclosure may have been done to increase pressure on Iran to cease enrichment activities. The Israeli government denied this report. In Tehran, Iran's Foreign Ministry spokesman Mohammad Ali Hosseini told a news conference that the newspaper report "will make clear to the world public opinion that the Zionist regime is the main menace to global peace and the region." He said "any measure against Iran will not be left without a response and the invader will regret its act immediately.".