I apologize for having spoken too fast
http://www.eurosport.fr/home/pages/V3/L3/S22/E5759/sport_Lng3_Spo22_Evt5759_Sto450348.shtml
Let me read the article & I will summarize it.
According to the French Team & Lyon (where the game was played) Doctor, it seems to have neurological causes, but not heart causes,since he only had a heart failure when he was brought to the stadium infirmary.
The autopsy has revealed nothing particular. Tests are in progress. Maybe more news tomorrow.
71 : Foe is down! He took a hit to the back of the head! There is not much movement from him! It could be serious!
http://www.eurosport.co.uk/home/pages/V3/L2/S22/E5759/live_Lng2_Spo22_Evt5759_Mtc63076.shtml
"Boys, even if it means dying on the pitch, we must win this semi-final," Marc-Vivien Foe told his Cameroon team mates at halftime of Thursday's Confederations Cup match against Colombia. Thirty minutes later the midfielder collapsed without warning in the centre circle. He died soon afterwards.
How ironic!