A senior prosecutor was arrested early Sunday on suspicion of taking bribes from the country's leading online game maker and using them for stock investments.

Jin Kyung-joon, 49, is accused of amassing massive amounts of wealth through shady stock transactions involving Nexon Co. The game maker allegedly gave some 400 million won ($348,000) to Jin in 2005, helping him make some 12 billion won in profits through stock transactions by 2015.

The Seoul Central District Court issued the arrest warrant, making Jin the first senior prosecutor in the 68-year history of South Korea's current prosecution system to be put behind bars while in office.

The allegations emerged early this year after Jin reported a whopping increase in his personal wealth in 2015. All ranking government officials and lawmakers are required to annually disclose their personal assets.

Jin offered to quit in April, but the justice ministry has not accepted his resignation.