Videos show automatic machine gun fire aimed at the opposing family's shops, and one scene appears to be inside a mall.
Three civilians were injured by gunfire on Sunday, including an 11 year old boy shot in the chest.
The feud between the clans was re-ignited last year when one member of the Al-Owaiwi family killed a member of Al-Jaabari family in a revenge act for the murder of a relative more than 15 years ago.
A mass rally in Hebron called for a solution to the security chaos as well as an end to high prices.
The PA's hold on things is fraying badly. And when Abbas dies, things are going to get very ugly.
