FK Gothenburg's home match with Malmo in Sweden's top flight was abandoned when a firework exploded under the feet of a substitute.
Malmo winger Tobias Sana, 26, was warming up at the Gamla Ullevi stadium when the device bounced under his feet.
Former Gothenburg player Sana reacted by throwing a corner flag at home fans.
Players from both teams were taken off the pitch by the referee with the score 0-0 with 12 minutes remaining on Wednesday in the Allsvenskan fixture.
A decision to abandon the game was made after security in the ground could not be guaranteed.
"I heard the banger, I looked over and saw Tobias Sana bend down," said referee Jonas Eriksson.
"After that it went quickly, I blew the whistle and got the players in directly."
Gothenburg are seventh in the league with Malmo in sixth.