Hapoel fans threw missiles at police and security officers on the pitch after their team lost 1-0 to arch-rivals Maccabi Tel Aviv in one of the most heated contests in a derby clash that has been dominated by Hapoel for the past four years.
In the closing stages of the match, with Hapoel players' tempers fraying, they repeatedly argued with referee Menashe Mashiah, who eventually sent off Avihai Yadin and Salim Toama.
"The crowd's behaviour was grave but it was fuelled by events on the pitch and the behaviour of the players and their remonstrations against the referee's decisions after he sent off two players," an Israeli Football Association disciplinary tribunal said.
If the punishment stands, it could cost Hapoel a place in next season's Europa League.
