Sports

At least 50 people injured, 40 arrested after soccer riots during Serbian soccer derby

  • Partizan soccer fans light torches during a Serbian National soccer league derby match between Red Star and Partizan, in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)

    Partizan soccer fans light torches during a Serbian National soccer league derby match between Red Star and Partizan, in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)  (The Associated Press)

  • A Serbian riot police officer arrests an injured soccer fan during a Serbian National soccer league derby match between Partizan and Red Star in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)

    A Serbian riot police officer arrests an injured soccer fan during a Serbian National soccer league derby match between Partizan and Red Star in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)  (The Associated Press)

  • Red Star soccer fans, left, clash with Partizan fans during a Serbian National soccer league derby match between Red Star and Partizan, in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)

    Red Star soccer fans, left, clash with Partizan fans during a Serbian National soccer league derby match between Red Star and Partizan, in Belgrade, Serbia, Saturday, April 25, 2015. Thousands of riot policemen have been deployed throughout Belgrade to prevent possible violence during a derby match between bitter rivals Red Star and Partizan. (AP Photo/Darko Vojinovic)  (The Associated Press)

Authorities say at least 50 people have been injured and 40 arrested after fierce clashes between Red Star and Partizan fans.

The riots erupted before the match between the two biggest Belgrade rival clubs at the Red Star stadium in the capital on Saturday.

The start of the match had to be postponed for 40 minutes when hooligans hurled stones at each other and battled with sticks. The play was also stopped for seven minutes because of flares hurled on to the pitch.

Several fans were seen bloodied. Police say 20 officers were injured when they tried to separate the fighting groups.

The match ended in a goalless draw, giving Partizan a five-point lead over Red Star in the standings.