Couple of facts:
-no baby
-8 fatalities, 2 female and 6 male
-3 survivors, of which one is pilot. All used parachutes.
-comp air 8, oh-xdz
-local tv(mtv3) has obtained footage of the a/c falling down. In this footage it's clearly visible that part or all of one wing is missing.
-jumping from 4km is normal.
source is local news and flightforum.