South Korean PM Lee Wan-koo has offered to resign after facing accusations of accepting bribes.
President Park Geun-hye has not said if she will accept Lee Wan-koo’s resignation, but has expressed sympathy for him.
State news agency Yonhap said Park Geun-hye had called for a “thorough investigation” into the scandal.
Lee Wan-koo denies accepting 30 million won ($27,700) in illegal campaign funds in 2013, but has come under pressure to stand down.
Under South Korean law, politicians cannot accept more than 100,000 won in contributions.
Sung Wan-jong was about to be questioned by authorities over allegations that he embezzled company money to bribe politicians.
Investigators found a note in his pocket listing the names of several people, including Lee Wan-koo, and numbers which appeared to indicate amounts paid to them.
An opposition party then called for Lee Wan-koo’s impeachment.
Referring to Lee Wan-koo’s resignation, Park Geun-hye said in a written statement: “I find it regrettable. I also feel sympathy for the agony of the prime minister.”
The president is currently in Peru on a four-day state visit. Yonhap reported that she would decide on whether to accept Lee Wan-koo’s resignation by next week.
Lee Wan-koo has been in the job for only two months.
He filled the position after a protracted hunt for a candidate to replace his predecessor, Chung Hong-won.
Chung Hong-won resigned shortly after the Sewol ferry disaster in April 2014 that killed more than 300 people.