Kang is facing accusations of diverting the funds of STXHeavy Industries to illegally support other ailing affiliates, inflictinglosses of nearly KRW 300bn ($280m) on the group, prosecutors said.
The 64-year-old former chairman was summoned twice forquestioning last week.
Now Seoul central district prosecutors' office has asked aSeoul court to issue a warrant for further questioning.
A prosecution investigation into the former chief waslaunched in February when the company filed a complaint against five formerexecutives, including Kang.
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