The activists were placing flowers at the statue of Cuban independence hero, Jose Marti, when approached by a group of Castro regime agents, who began to violently beat them.
Among those attacked were a group of American citizens, including Orlando Gutierrez of the Democratic Directorate, Silvia Iriondo of Mothers Against Repression and Gus Monge.
The Cuban dissidents include former political prisoner Jorge Luis Garcia Perez "Antunez," his wife Yris Perez Aguilera and Leticia Ramos Herreria of The Ladies in White.
The Panamanian police watched as the attack took place. Then, it detained the Cuban dissident leaders and American citizens. Meanwhile, the Castro regime agents were allowed to walk.
They are currently being held in the San Francisco detention facility -- facing deportation to Cuba and the United States, respectively.
Also, this afternoon, at the Summit's Civil Society Forum, Cuban dissident leaders, including Rosa Maria Paya and Roberto de Jesus Guerra, were blocked from entering the convention hall by a Castro regime delegation.
The regime delegation that disrupted the Forum was headed by Raul Castro's confidant, former Minister of Culture (and head censor), Abel Prieto.