A small explosion caused minor damage Friday in a courtyard outside a Greek Orthodox church in Gaza City, church workers said. The early morning blast appeared to have been caused by a small, homemade explosive device, which damaged a door and caused minor damage to the floor and walls, church workers said. No one was wounded. A second explosion hit the church hours later and a concussion grenade was thrown near the church in the afternoon. Neither of those blasts caused any damage, but church officials worried that the attacks were retaliation for remarks that Pope Benedict XVI made Tuesday that angered Muslims. "This is the first time this has ever happened to our church," said the church's priest, Rev. Artinious Alexious. "We don't know why they have done this. We are Greek Orthodox and have no relation to the Pope."