Wow. Soccer fans are hardcore. We'd expect this kind of thing in cricket. But soccer? In a match between a Saudi team and an Iranian team, one Iranian player found a grenade on the field. He threw it away and it promptly exploded:
Watch as Sepahan midfielder Adel Kolahkaj (40) casually tosses the small explosive off the field as though it were a stray beanbag. But the instant it hits the ground, it blows up, sending the stunned players and officials running for cover.
Some concussion grenades only have an effective casualty radius of a couple meters in an open field. It could also be some sort of training device.