Police opened an investigation on Sunday into a mob of Beitar Jerusalem fans that stormed Malha Mall last week and allegedly attacked Arab workers while chanting racist songs in the food court on the second floor.

The incident followed a soccer match at the nearby Teddy Stadium.

According to fan videos posted online and the mall’s closed circuit TV footage, some 300 fans rioted for approximately 40 minutes before police and mall security guards were able to contain them, chanting “Death to Arabs!” and “Muhammed is dead!”

The police were roundly criticized for not making any arrests and for allowing the rioting to continue for so long. On Sunday, police said they opened an investigation into the incident, despite the fact that the Arab workers refused to file a formal complaint against the rioters.

The incident occurred around 10:00 p.m. on Monday, after Beitar won 2- 1 against Tel Aviv’s Bnei Yehuda.