S Korea scandal: Former aide to president detained
A former aide to South Korea's President Park Geun-hye has been detained by prosecutors, say officials.
Ahn Jong-beom is the second aide to be detained in a scandal which is threatening the president's position.
He and Ms Park's long-time friend and mentor Choi Soon-sil are suspected of using their presidential connections to persuade corporations to donate funds to foundations they were involved with.
Ms Choi was detained on Monday and is still being held.
Mr Ahn had told reporters on Wednesday he would take responsibility for his actions, the Yonhap news agency reports, without giving further details.
He has been placed under emergency detention to prevent the possibility of him tampering with evidence, prosecutors said. They have 48 hours to formally request an arrest warrant in court.
On Wednesday South Korean prosecutors requested an arrest warrant for Ms Choi. Seoul Central District Court is due to review the request on Thursday, a court spokesman said.
Several banks have also been raided in connection with the controversy, which has prompted widespread anger.