world news  Girl's killing puts truce at risk  The killing of a
10-year-old Palestinian girl, shot dead in the playground of her
school in southern Gaza yesterday, threatened to undermine a
tentative truce after Hamas blamed the Israeli army and
retaliated by firing mortars into a Jewish settlement.  Noran
Iyad Deeb was shot in the face as she lined up for assembly at
the UN-run school in Rafah refugee camp. A second girl was hit
in the hand.  Palestinian officials blamed Israeli troops. The
UN said it could not identify the source of the gunfire for
certain but that shooting was heard from the direction of
Israeli posts in the militarised border area.  After
investigating, an army spokesman said: "According to our
examination, the girl apparently was not shot by Israeli army
gunfire."  A few hours after Noran's death, Hamas fired several
mortar shells into the Neve Dekalim settlement in Gaza, damaging
a building.  Abu Obeida, a spokesman for Hamas's military wing,
told Reuters the mortars were fired in retal