A crypto investor accused of persistently ringing the doorbell of the house of Do Kwon, co-founder and CEO of Terraform Labs, enters Seongdong Police Station in Seoul, May 16. Yonhap

Do Kwon, the wanted Korean founder of the failed cryptocurrency Terra, denied Sunday he was on the run after the Singapore police said he was not in the city-state as had been believed.

Kwon's whereabouts have been thrown into question after the Singapore Police Force (SPF) statement late Saturday, and his tweets did not reveal where he was.

The collapse of Terraform Labs earlier this year wiped out about $40 billion of investors' money.

A Korean court on Wednesday issued an arrest warrant for Kwon.

Early Sunday he said on Twitter: "I am 'not on the run' or anything similar", but did not reveal where he was.

"For any agency that has shown interest to communicate, we are in full cooperation and we don't have anything to hide," he added.