Jaleshwar Prasad, 48, fell unconscious on Wednesday while performing steel work at Al Bayt stadium in Al Khor...[he] is the third Indian employed on a World Cup site to die of a heart attack in the last six months, according to a February report by the Supreme Committee...Autopsies and post-mortems on people who die sudden and unexpected deaths are forbidden by Qatari law unless a crime is suspected. 

"Workers dying suddenly from heart attacks is something we hear about often, the causes are not always clear. But we're moving now into the hottest time of the year when the risk of fatality increases," said Amnesty Gulf researcher Mustafa Qadri. "When a worker dies, Qatar needs to get to the bottom of what happened. People's lives are in danger".