In Gaza City's Sabra quarter, troops shot in the head a 17-year-old girl, Manal Suleiman Mohammed al-Dairy, who died on the operating table at Shifa Hospital, Arab reports said.
About 300 Sabra residents _ some waving outlawed Palestinian flags and chanting "God is great!" _ carried Khatib's body through the streets.
Raed Abu Sabra, another federation official, said the union group also makes monthly payments of about $120 to families of workers jailed by Israel.
Alaa, his 25-year-old son, said five Israeli soldiers took Saftawi from the stone house on a dirt street of Gaza City's Sabra district Sunday, adding him to a growing list of Palestinians being held without trial for up to six months.
In retaliation, Christian batteries fired on the Moslem residential districts of Sabra and Kasskass near Beirut's dividing Green Line, a police spokesman said.