The Shin Bet security service that it has arrested two Palestinian citizens from Halhoul who admitted to throwing a rock that caused a fatal crash near Kiryat Arba on September 23rd. 25-years-old Asher Palmer and his one-year-old son Yonatan were killed after their vehicle flipped over.

The Shin Bet also arrested three Palestinians on suspicion of stealing Palmer's gun after the crash. The investigation was a joint opeation by the Shin Bet, Israel Police and the IDF.

Initially, The Israel Defense Forces Spokesperson’s Office issued a statement shortly after the crash in which it declared the Palmers' death to be the result of an accident and not a terror attack.

However, police have now verified that the car veered off the road after a rock was allegedly thrown by a Palestinian at the vehicle.

In a 'Price Tag' attack in the Bedouin village of Tuba-Zanghariyya earlier this week, in which the local mosque was torched, attackers also painted the word "Palmer" on the walls, presumably a reference to the terror attack.

On Thursday, IDF figures revealed that September was the most violent month in the last year and a half in terms of rock throwing in the West Bank.

There were 498 incidents of rocks being thrown last month - 33 percent more than the monthly average over the past year. This was the highest monthly total since Operation Cast Lead in Gaza in early 2009.