Osama Atallah, a Palestinian teacher in Gaza, Fatah member, and outspoken critic of Hamas, was arrested by masked gunmen claiming to be part of the Hamas internal security.
The masked gunmen told Osama's family that he would be released within a few hours. Instead, the family received a call from the hospital that Osama was in critical condition. He died shortly after.
Fatah claims that the arrest came "because of his public and continued criticism of the performance of the Hamas militias in Gaza."