Three Palestinian youths in their twenties, two of whom were related, were killed and five others wounded in an explosion in the Gaza Strip on Friday. The blast occurred after one of the youths picked up a stray IDF shell and brought it home, Army Radio reported. Initial reports on the cause of the explosion were conflicting. Palestinian sources claimed that it occurred during IDF shelling, while the army denied that it was firing on Gaza at the time of the incident, and said that the three were handling explosives to be used in a terror attack when the bomb...