The attackers targeted the Friday prayers, a sacred moment for Muslim believers.Over the last years, Egypt has been hit by a number of attacks against places of worship of all faiths. No one should be killed because of their religion, no sacred place should be profaned by violence and terrorism. People of all religions – and none – are united in the fight against terrorist violence.Perpetrators of such unbearable acts must be held responsible.I want to send, on behalf of the EU, my heartfelt condolences to the victims, their families and the Egyptian people.As Europeans, we share the mourning in front of these tragedies. As institutions, we will continue to stand with the Egyptian authorities and people as they confront the threat from terrorism.