An American man, who woke up speaking Swedish but with no idea of his identity, has travelled to Sweden in the hope of restoring his memory.

Michael Boatwright was discovered unconscious in a motel room in Palm Springs, California, in February.

After waking up in hospital, he couldn't remember his name, where he was from or even recognise his son.

Doctors have been baffled by the rare case of transient global amnesia which typically lasts for just a few hours.

Anna Boyd reports.