President Trump on Monday denied Iran’s claim that it dismantled an elaborate U.S. spy ring tasked with monitoring key military sites, dismissing the reports as a “totally false story” amid rising tensions between Tehran and the West. Iran said that its intelligence forces identified and arrested 17 Iranians suspected of spying for the CIA and that some of them have been sentenced to death. The announcement adds to concerns about Tehran’s nuclear program and its efforts to impede shipping traffic through the Strait of Hormuz.