A group of Gaza journalists protested Hamas' imprisonment of one of their colleagues yesterday.
Public protests against the Hamas government are very rare in Gaza. Usually, Hamas shuts down any protests under the pretext of the organizers not having the proper permits.
I cannot find the name of the journalist. Reporters Without Borders has not seemed to update its "Palestine" section in over a year.
UPDATE: An email correspondent who knows Arabic looked at the photos are figured out that these are Hamas "journalists" who are protesting the PA imprisoning their colleagues in the West Bank!
One of the signs they were holding was the Hamas Al Aqsa TV logo: