(Recasts for pipe-bomb, injury) GAZA, Dec 13 (Reuters) - A Palestinian threw a pipe-bomb at a Hamas rally in the Gaza Strip on Wednesday, wounding a supporter of the governing Islamist group, witnesses said. Hamas representatives blamed members of the rival Fatah for the attack in Nusseirat refugee camp, which came amid spiralling inter-factional violence. Fatah spokesmen could not immediately be reached for comment. The Nusseirat rally was held to protest against the killing earlier on Wednesday of a Hamas judge by gunmen.
