Ashraf al-Najjar said that members of the Hamas movement attacked a memorial ceremony for his daughter. He said they tore down posters, damaged 80 chairs and beat 10 people who went to a private hospital for treatment.
There might be some political infighting as to which group "owns" Najjar and can gain the political benefits of being associated with her.
Fatah denounced the attacks.
(h/t Tomer Ilan)