South Korean police were on Wednesday hunting a kidnapper who escaped a bid to snare him and fled with a 48,000 dollar ransom in fake bills.
Police said the 32 year old, identified as Mr Jeong, remained at large after using some of the bills to buy a seven million won (4,800-dollar) motorbike in Seoul on Tuesday.
Police had tricked Jeong and his accomplice by paying a 70 million won ransom with fake banknotes to secure the release of the female owner of a Seoul bakery a week ago.
The hostage was freed unharmed, and police arrested the accomplice. But Jeong escaped with the counterfeit money.
"Given the urgency, we decided to launch a hunt more aggressively disclosing his photo through media and putting a cash prize on his head," a detective at Seoul's Yangcheon police station handling the case told AFP.
Police have offered a five million won cash reward.
Officials at the Bank of Korea complained that police had not informed the central bank of the use of the fake banknotes.
Police said they had photocopied the bills for the operation.