State investigators said Tuesday they have added another count of bribery against a former Navy chief already indicted for taking hundreds of thousands of dollars in kickbacks from a troubled defense firm while in office seven years ago.

Retired Adm. Jung Ok-geun, who served as the Navy Chief of Staff from 2008 to 2010, received 60 million won ($54,000) from a company that brokers sales of German-made communications equipment in 2009, a government anti-corruption task force said.

Jung had rewarded the company a 2.3 billion won contract to supply equipment for a Navy ship in late 2008, investigators said.

Jung was indicted last month for asking for 770 million won in bribes from two affiliates of STX Group in 2008. He allegedly offered the companies contracts to build Navy ships in return. The bribes were provided in the form of a sponsorship to a yacht event arranged by Jung's son, investigators said. The yacht company whose majority stake was owned by the younger Jung went out of business shortly thereafter, raising suspicions that it may have been a paper company.

Jung's son, a former Navy officer, and a non-executive director of an STX Group affiliate have also been indicted for collusion. (Yonhap)