A top Qatari official just made a shocking admission ... estimating between 400 to 500 migrant workers died while working on projects tied to the FIFA World Cup, significantly higher than previous official figures indicated.
Hassan Al-Thawadi -- chief of the iconic soccer event -- disclosed the amount during an interview with Piers Morgan on TalkTV Monday ... saying hundreds of migrant workers died as a consequence of World Cup labor.
"Between 400 and 500," Al-Thawadi told the British reporter in a response that appeared off the cuff, adding, "I don't have the exact number.