Rabbi Chaim Kanievsky is laid to rest in the presence of Chief Rabbis Shlomo Amar and David Lau in Bnei Brak.
Police blocked entry to the cemetery to members of the public, allowing only family members and senior public figures to attend over fears of overcrowding.
Nevertheless, hundreds of people manage to break through the barriers and enter the cemetery as police attempt to catch and detain them. Scuffles also break out at the entrance to the cemetery as many of those blocked attempt to enter.
So far, first responders say that 64 mourners have been treated at the scene and five taken to hospitals for further treatment.
At least 500,000 people are believed to be in attendance. Israel Railways is heavily boosting train service in the area to help alleviate traffic.