Hsu declined to answer reporters questions as he left one of the Taipei offices of Taiwan prosecutors late Thursday. Calls to the prosecutors office before office hours on Friday were not answered. Taipei prosecutors have not issued any statements so far about their investigations into Gold Apollo.

Taiwan-based Gold Apollo said the devices were made by a Budapest-based company with a license to use its brand.

The deadly simultaneous explosions triggered by hundreds of pagers carried by Hezbollah members in Lebanon have thrust a little-known Taiwanese electronics manufacturer into the global spotlight, after its damaged products were identified in images following the attack.