"It's no use accusing Ariel Sharon of the bloodshed which followed
his visit to the compound of the mosques on the Temple Mount.
...Since the Kibia massacre of 1953"
http://www.infopal.org/palnews/updates/avnery1.txt

I knew, even at the time, that, on the other side of the border, the scouts often killed on purpose. Unit 101 and the Scouts carried out certain punitive and retaliatory actions. These appeared necessary in view of raids of sabotage and murder that infiltrators from across the green line occasionally attempted in Israel.
One of the punitive actions, of which one heard through the grapevine, was the assassination of a doctor on the Hebron road. Men of Unit 101 penetrated by night to the Jerusalem - Hebron road, well inside territory held by Jordan. They flagged down the first car that came along and killed the driver. He happened to be a doctor answering a call. This was in 1953.
Another generally known retaliatory raid involved the village of Kibia, where, on the night of October 14 1953, a combined force of Unit 101 and paratroops killed over sixty villagers, including women and children.
http://www.eng.ua.edu/~akatz/IFO.shtml#EXCERPT1

Unit 101 only existed for five months and was disbanded after a raid in which the unit's members killed dozens of unarmed enemy citizens in an infamous brutal retaliation act ("the Kibia Raid").
http://www.isayeret.com/terror/article.htm