Prosecutors visited the residence of Chun Doo-hwan, the disgraced former South Korean president, Thursday afternoon to question him on the whereabouts of illicit slush funds he amassed during his presidency and on allegations that his son and financial consultants are helping him hide the illegal money.

During their interrogation session, prosecutors focused on how 7.3 billion won had been transferred to the bank account of Chun's second son, Chun Jae-yong.

The ex-president is believed to have hoarded away some 200 billion won in illegal slush funds during his presidency.

Earlier in the day, prosecutors said they had found new evidence that tens of millions of dollars from Chun's slush funds had been entrusted to his three financial managers.

The prosecution is currently investigating one of those managers, identified only by the surname Son, and trying to locate the other two, who left the country in October.

Prosecutors investigating the hidden assets of the former president, who was convicted of embezzlement and bribery in 1997, said that part of the money he embezzled had gone into the hands of his personal property managers.

Chun, who seized power through a military coup, was convicted of embezzlement and bribery in 1997 and was ordered by the courts to repay 220 billion won ($US 190 million) he had amassed from businesses during his 1980-1988 dictatorship. Chun subsequently claimed he has only 290,000 won (US$250) in his bank account.