SEOUL (Reuters) -South Korea's jailed ex-President Yoon Suk Yeol was indicted on additional charges on Saturday as a special prosecutor continues investigating him for his short-lived declaration of martial law in December. The new charges include obstruction of the exercise of others' rights by abuse of authority, ordering the deletion of records and blocking the execution of arrest warrants, the prosecutor's office said in a briefing. Yoon has been on trial on charges of insurrection, which is punishable by death or life imprisonment, facing additional charges since the special prosecutor was appointed in June to take over the cases against him.