A funeral for a dead Islamic Jihad operative turned violent in Gaza on Wednesday when Hamas men opened fire at supporters of the rival Islamic Jihad organization, leaving one person dead, medical officials said. The Hamas men began shooting after Islamic Jihad members threw stones at a Hamas police station during the funeral of an Islamic Jihad gunman, witnesses said. One unarmed Islamic Jihad supporter was killed and three others were wounded, medical officials said. The funeral was being held for a gunman who was wounded in a battle with Hamas last week and died overnight. Tensions between Hamas and the Islamic Jihad have risen since June, when Hamas defeated Fatah movement and took over Gaza. Islamic Jihad, which is far smaller than Hamas, resents the attempt by Gaza's new rulers to force it to accept Hamas' sovereignty and new rules allowing only Hamas men to carry weapons. Two people - an Islamic Jihad member and a civilian - were killed in clashes between the groups last week.