Iran could prevent even "a single drop of oil" passing through the Strait of Hormuz if its security is threatened, a naval chief said on Saturday, as tensions simmer over Tehran's nuclear program.

Tehran will increase its military presence in international waters, said Ali Fadavi, naval commander in Iran's elite Islamic Revolutionary Guard Corps (IRGC).

"If they (the U.S.) do not obey international laws and the IRGC's warnings, it will have very bad consequences for them," Fadavi said, according to Iran's Fars News Agency.

"The IRGC's naval forces have had the ability since the (Iran-Iraq) war to completely control the Strait of Hormuz and not allow even a single drop of oil to pass through."