Original: These were caused , police say , by the electrocution of two boys , Zyed Benna and Bouna TraorÃ ; a third boy , Muhittin Altun , suffered electric shock injury from the power substation they were hiding in .
Simplified: This black-out was caused by the death of Zyed Benna and Bouna TraorÃ in the power station and the injury of the third boy .