Lebanese security officials and Palestinian officials in Lebanon say that an exchange of gunfire between rival factions in a south Lebanon Palestinian refugee camp wounded one person. The officials say Wednesday's clash in the Ein el-Hilweh camp was between al-Qaida followers of the Jund al-Sham group and members of the mainstream Palestinian Fatah faction. The officials, who spoke on condition of anonymity because they were not authorized to talk to the media, say the wounded is a Fatah supporter. Further details were not available. Jund al-Sham has in the past clashed with Fatah inside the camp and Lebanese troops deployed around it. The camp is the largest of Lebanon's 12 Palestinian refugee camps and is a hotbed of Islamic extremists.