Authorities in Brazil say a policeman and a former police officer have been charged with killing eight people at a fan club of a popular soccer team.

A Wednesday statement from the Sao Paulo state prosecutor's office says the two were arrested May 7 in connection with the attack at the headquarters of the Pavilhao 9 fan group for the Corinthians team.

Police believe a dispute over drug dealing may have led to the April 18 shooting on the eve of the team's match with rival Palmeiras.

Witnesses reported that three gunmen stormed the gritty site where fans meet underneath a highway overpass and shot seven people in the head. An eighth man ran to a service station after being shot but died later.

The third gunman is at large.