If it's the events that I'm thinking of, one of the drivers killed was a Bedouin from the Tarabin family. They literally gathered hundreds of family members to record a cellphone message to the perpetrators, who were mentioned by name. In the video, dozens of illegal weapons - mostly M-16 variants - were paraded and fired in the air. Tarabin is a well-known dangerous and hostile family, the Israeli police don't interfere with them (that's why they have all the illegal weapons).

I know of other Bedouins families that have rewards for the heads of other Hamas members.