Interpol has asked law enforcement agencies around the world to find and arrest Do Kwon, the founder of cryptocurrency Terra.
BBC Korea says a red notice has been issued for the 31-year-old, who is accused of fraud over the company's $40 billion collapse.
An arrest warrant was issued for him in his native South Korea earlier this month.
Do Kwon had flown to Singapore in May - before Terra's collapse - but authorities say he is no longer there.
South Korean prosecutors asked Interpol to put Do Kwon on a red notice list - which Interpol complied with - and asked the foreign ministry in Seoul to revoke Do Kwon's passport, saying he was a "fugitive".
Do Kwon has denied that he is in hiding but has not revealed his whereabouts.
https://twitter.com/stablekwon/status/1571197154256887808
Prosecutors also issued arrest warrants for five other unnamed people linked to the so-called stablecoin Terra and its sister token Luna.
Stablecoins are designed to have a relatively stable price and are usually pegged to a real-world commodity or currency - but Terra's value collapsed during this year's crypto slump.
The Terra Luna system crashed in May and the price of both tokens plummeted to near zero.
A Terra coin is now worth less than $0.0002, down from a high of $116 in April.
According to blockchain analytics firm Elliptic, investors in the two coins have lost an estimated $42 billion globally.
Some investors lost their life savings and South Korean authorities have opened several criminal investigations into the collapse.
Source: BBC
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