A suicide bomber wounded at least three members of Yemen's Southern Movement in Lahij Friday, according to an AFP report. 
The bomber targeted the separatist activists while the three were in en route to demonstrations scheduled for Saturday in the former South Yemen capital of Aden. The activists were immediately transported to a hospital in Aden and are currently in grave conditions. The bomber died. No group has yet claimed responsibility for the attack.
The Southern Movement has been the main opposition group considered responsible for stalling national dialogue talks in Sanaa  to establish a new government structure for the country. They most recently held a sit-in in Sanaa Wednesday, which forced dialogue organizers to cancel scheduled sessions for that day.  Delegates from the movement have demanded the new, united and Federal Yemen to be divided into two autonomous North and South regions, but other groups, particularly delegates representing the north, want Yemen to be divided into multiple regional units and have been in sole control of the sessions' decision-making processes, according to sit-in organizers.
Many members of the Southern Movement and related groups from the south have called for full secession and restoration of pre-1990 borders before South Yemen was united with the north to form present-day Yemen.