According to Fox there were definately two missles but don't know if either one was the one we've been worried about. per Fox, NORAD is confirming two missles.
N. Korea Launches Missile Into Sea of Japan
Jul 04 4:19 PM US/Eastern
http://www.breitbart.com/news/2006/07/04/D8ILCR380.html
TOKYO
North Korea test-launched a missile Wednesday that landed in the Sea of Japan, Japanese media reported.
The reclusive communist state launched the missile at 3:32 a.m., or 2:32 p.m. Tuesday EDT, and it crashed into the Sea of Japan several minutes later, public broadcaster NHK reported.
NHK said Japanese government officials were trying to determine whether it was a long-range ballistic missile that had been readied for launch recently. North Korea had been thought to be preparing a test-launch of its Taepodong 2 missile, which is believed to be able to reach parts of the United States.
Officials were not immediately available to confirm the report.