Iran state television says the powerful Revolutionary Guard has fired one of the longest-range missiles in its arsenal.
The third round of tests is meant to demonstrate the country's preparedness for an attack.
English-language Press TV said the Guard successfully tested the Shahab-3 missile, which is capable of carrying a warhead. It has a range of up to 1,200 miles, capable of striking Israel and U.S. Mideast bases and parts of Europe.
State television said Iran test-fired Shahab-1 and Shahab-2 missiles overnight, following tests of short-range missiles early Sunday. The Shahab-1 and Shahab-2 have ranges of about 185 miles and 435 miles, respectively.