According to the reports from the ground in Libya on the social media clashes had occurred in the town of Mizdah, both on its western and eastern sides.
Mizdah is close to western mountains and is inhabited by the rival Guntrar and Mashashiya tribes and has a presence of Zintanis. The same Zintanis which are holding Saif al-Islam more then a year since the capture of Saif al-Islam last year.
Last time the two sides clashed was in June 2012, around 150 people had died. The majority of these clashes which are occurring in Libya including in the town of Mizdah are widely ignored by the major mainstream news outlets as none news.