From Haaretz:

IDF troops on Saturday apprehended an 18-year-old Palestinian near Itamar, armed with a knife, who planned to carry out a terror attack in the settlement. The soldiers were tipped off by the youth's father, who arrived at an IDF checkpost near Nablus and requested that the soldiers prevent the attack. The IDF said that by notifying the troops, the father had saved his son's life.