A special investigation team led by independent counsel Park Young-soo was launched in December to investigate allegations Park let her longtime confidante meddle in state affairs and extort money from businesses.
The team, whose investigation is by law to end tomorrow, had asked acting leader and Prime Minister Hwang Kyo-ahn to allow 30 more days of investigations.
But Hwang's office said today it rejected the request because key suspects implicated in the scandal have already been indicted.