Johannesburg - FIFA says it asked stadium security to intervene after a spectator targeted a laser beam at the field during Argentina's World Cup match against Nigeria.

The bright green light was aimed at players and Argentina coach Diego Maradona during Saturday's match in Johannesburg.

FIFA says it noticed the beam immediately and alerted security staff at Ellis Park.

FIFA was concerned by fans using laser pens at qualifying matches. It fined the Greek football federation $21 800 after beams were directed at opposing Switzerland and Israel players.

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