Update | Singapore police probe ‘unnatural’ death of American CEO of bitcoin trader

Police are investigating the death of the 28-year-old American boss of a Bitcoin exchange found dead at the base of a Singapore apartment block.

They say Autumn Radtke's death - the latest misfortune linked with the troubled virtual currency - appears "unnatural".

Police in the city state do not expect foul play. The term "unnatural death" is used to refer to suspected suicides and other deaths not due to natural causes like an illness.

Radtke, chief executive of Singapore-based First Meta, was found dead on February 26.

A local technology website initially reported that she may have committed suicide, but later updated its report to say it was "unclear" how she died.

Broadcaster Channel NewsAsia said on its website yesterday that Radtke "was found dead at the bottom of an apartment block".

The virtual-currency community is in turmoil after the collapse of Tokyo-based MtGox, one of the longest-established Bitcoin exchanges, due to a suspected theft worth nearly half a billion dollars. Canada-based Flexcoin was also forced to shut down, saying that someone attacked its systems and stole nearly US$600,000 worth of Bitcoins.