According to photographs shared by the restaurant, Soli was hospitalized with a head injury.
Kanaan called on the police to take action to identify and bring the alleged perpetrators to justice. The restaurant urged others to contact the police and spread word about the incident.
The Berlin Police did not immediately respond to The Jerusalem Post’s request for comment.
The restaurant announced that it was selling the Israeli-Palestinian heart pins to raise money for the Israeli artist’s care and recovery.
Kanaan was established by Israeli entrepreneur Oz Ben David and Palestinian Restauranteur Jalil Dabit, according to its website.
The restaurant advertises itself as a safe place from racism, homophobia, and transphobia, and employs refugees from the Middle East and Africa.