Whenever there is a period of relative calm in Gaza, it is always followed by a real explosion. This one was between Hamas and a pro-Fatah family, where they battled overnight using RPGs and other peaceful weapons smuggled in from Egypt, and the death toll has hit 5.
Our 2007 Palestinian Arab self-death count is now at 545.
UPDATE: One of those "mysterious explosions" at a training camp in Gaza, killing a 19-year old. Palestine Press Agency quotes people who think that this man was actually killed during the fighting mentioned above but they try to cover up any of their battlefield losses. 546.