FIFA president Sepp Blatter has threatened to come down hard over the trouble which blew up after Switzerland on Wednesday knocked Turkey out of next year's World Cup.
"I can tell you this, not as a Swiss, but as the president of FIFA that we will act here and we will act tough," Blatter told a news conference.
FIFA will decide on sanctions before the World Cup draw on Dec. 9. Penalties could range from a warning to a ban for individual players or countries.
Earlier in the day Blatter had threatened to ban Turkey from the qualifying competition for the 2010 World Cup in South Africa.
Switzerland lost a dramatic second leg 4-2 in Istanbul on Wednesday but advanced to next year's finals thanks to the away goals rule.
Swiss players left the pitch under a hail of objects thrown by the crowd and players from both sides clashed in the tunnel.
Reports said Swiss defender Stephane Grichting was taken to hospital with a perforated urinary tract.
Switzerland coach Kobi Kuhn was also hit by coins and press officer Pierre Benoit said the incidents would be reported.
Tuncay Sanli scored a hat-trick for the Turks, who finished third in the 2002 World Cup, but Marco Streller's 84th minute goal put the Swiss through.
However, the match ended with tempers frayed and television footage showed Swiss player Benjamin Huggel kick a member of the Turkish coaching staff as he ran off the pitch. Then former Aston Villa defender Alpay aimed a kick at Streller as the goalscorer went down the tunnel towards the dressing rooms and the trouble erupted.
The Swiss bus had been pelted with eggs when they flew in on Monday and the Swiss national anthem was whistled during Wednesday's pre-match ceremony -- as the Turkish anthem had been in Bern.
Trinidad and Tobago, Australia, Spain and the Czech Republic on Wednesday became the other four World Cup finalists -- joining 26 other teams that had qualified earlier. With 31 places up for grabs (Germany qualified directly as hosts), the battle for a place in Germany was tight and several favourites will not be making the trip to the finals next year.
Turkey, for example, was one of the surprise teams in South Korea/Japan last time around and finished third, but on Wednesday they were knocked out at the very last hurdle by Switzerland, who advanced -- even though they lost 4-2 in Istanbul, but went through on the away goal rule.
Other European teams that qualified on Wednesday were Spain, who had virtually guaranteed their place in Germany in the first match when they beat Slovakia 5-1 and added a 1-1 on Wednesday, and the Czech Republic, who won 1-0 against Norway -- as they had in the first leg.
The three teams join 10 other European teams who qualified, as well as Germany.
Most impressive of the European qualifiers were probably the Dutch (who won Group 1 with 32 points), Ukraine and Portugal.
The 1998 champions, France, had more trouble than expected in Group 4, managing only one win from six matches against Israel, Switzerland and Israel, but still topped the group and went through.
In Group 5, Italy won comfortably ahead of Norway, while both group winners England and runners-up Poland qualified directly from Group 6 with the Poles being one of two best second-placed teams that went through.
Arguably the biggest upset of the qualifiers occurred in the African Group 4, where a war-ravaged Angola managed to qualify ahead of Nigeria.
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