At least seven civilians were injured, one seriously, when the police tried to disperse protesters from southern Yemen factions on Wednesday, Almasdar Online reported, quoting a statement by local sources.
A demonstration was staged in Shabwa province by the pro-unity forces within their activities but a pro-secession faction of the south movement, Harak, intercepted it forcing the police to intervene, the website said.
"The police fired bullets in the air and sometimes at the protesters to stop the clashes injuring several of them, one of them was in crucial condition," it quoted medics as saying.
The main demonstration was organized by the southern revolutionary forces council, it said.
"The council gathered its pro-unity fans in the Nasab area before the demonstration moved on, but the Harak group rallied to intercept the demonstration," the website said.
"Fans of both sides clashed hurling stones at each other and then the police intervened to disperse them. The police fired bullets injuring protesters," the sources explained.
After the 2011 popular uprising against the former regime, disagreements between southern factions expanded affecting their operation and casting a cloud on the fate of their cause.
The southern movement, Harak, divided into several groups including those who refuse the demand of secession.