A Mirage 2000 fighter jet, which was on a flight training mission, crashed into waters off northwest county Hsinchu in Taiwan Monday morning, according to local media reports.
Two pilots have been rescued following an ejection from the craft before the crash.
The cause of the crash is still under investigation.
The latest accident came five days after an F-16 fighter jet crashed during a routine training in waters near southwest Taiwan's Chiayi County.
The pilot was also rescued during the May 15 crash.
