Sudden deaths of hundreds of migrant workers in Qatar not investigated

Exclusive: in majority of cases, authorities do not perform postmortems, despite recommendations from regime's lawyers

Qatar is failing to investigate the sudden deaths of hundreds of migrant works, the Guardian can reveal.

Hundreds of labourers in the World Cup host nation die each year, with the majority of the fatalities attributed to heart attacks or "natural causes" by the Qatari authorities. Many are young men who die in their sleep - a phenomenon locally dubbed "sudden death syndrome".