Unidentified.

This is coolbert:

Normally these type of launches would require a NOTAM to be issued. Aircraft stay out of the area!!

"A NOTAM is a notice containing information essential to personnel concerned with flight operations but not known far enough in advance to be publicized by other means. It states the abnormal status of a component of the National Airspace System (NAS) – not the normal status."

NO NOTAM!

"Watch: Mysterious South China Sea Missile Launch Came Dangerously Close To Commercial Airliner"

From the Internet web site "Zero Hedge" the article BY TYLER DURDEN MAY 27.

"An unknown foreign military in southeast Asia has reportedly test launched an SLBM, or submarine-launched ballistic missile, which appears to have endangered a nearby commercial aircraft full of people. Stunning video taken from a Cathay Pacific Boeing 777 as it flew over the South China Sea just as the unidentified submarine launched the missile shows the airliner remarkably close. The Drive reports that it was likely a test of either the Chinese or South Korean military, but not even the precise date of the event has been confirmed at this point"

"Twitter user @jchovernut, a pilot for U.S.-based airline Allegiant Air and a veteran of the U.S. Navy's submarine community, posted the video, seen below, online on Tuesday. 'They were over the South China Sea & were issued a last-minute hectic call from ATC: 'turn left 90 degrees immediately!!,'' according to one Tweet accompanying the video."

See the twitter video showing the missile from launch as it ascends: https://twitter.com/i/status/1529201510533550080

coolbert.