Livorno, June 18 - An Italian photographer who was injured and arrested at protests in Istanbul has been released, his sister said Tuesday. Daniele Stefanini, 29, was struck in the head by Turkish police on Saturday during a demonstration in the city. After being hospitalized he was placed in police custody. The Italian foreign ministry has confirmed his release. His sister Alessia said he will return to Rome later on Tuesday. Since the beginning of anti-government protests in Turkey, three people have been killed and about 7,500 injured - at least 50 of those seriously hurt. A police officer was killed during a fall from a bridge while chasing protesters, who began their demonstrations against a park demolition but have moved on to demand broader government reforms. Lawyers are raising concerns about police violence against demonstrators, many of whom have been peaceful. Journalists are also being targeted and several have been arrested and beaten.