Taiwan's first domestically built submarine prototype will begin underwater testing after it launches later this week.
Ministry of National Defense (MND) Minister Chiu Kuo-cheng is standing by and defending the estimated costs of the Indigenous Defense Submarine.
Local shipbuilder CSBC says a prototype of its first domestically manufactured submarine is set to undergo final tests in September.
The Supreme Prosecutors Office says an investigation has been launched into allegations of interference and information leaks involving Taiwan's indigenous submarine programme.