Ex-boss of MtGox bitcoin exchange arrested in Japan over lost $390m

Mark Karpeles, the former head of defunct bitcoin exchange MtGox, has been arrested in Japan, and is reportedly to be questioned over the 2014 disappearance of nearly $390m (£250m) worth of the virtual currency.

A spokesman for the Tokyo police said French-born Karpeles, 30, was suspected of accessing the exchange’s computer system in February 2013 and inflating his cash account by $1m.