Following a year of relative calm in Libya, fighting erupted again this week in the capital Tripoli. While rival militias have vied for power since the overthrow of Moamer Kadhafi in 2011, the current escalation indicates Libya's armed groups have consolidated their power. The fresh spike in violence shows the government in Tripoli is still not in charge says Rhiannon Smith, an expert from the Libya Analysis thinktank. There are a lot of divisions and the armed groups are getting more and more powerful, but there haven't been major clashes." Read more on RFI EnglishRead also:Fighting between rival militias in Libya kills dozensTunisia, Libya to share responsibility for migrants stranded on borderClashes erupt in Libyan capital, amid fears of a return to civil war