Jordan's Popular Democratic Unity party says at least 8 of its members were wounded in the southern city of Karak during a protest demanding government reforms.
The political party said in a statement issued Friday that the injured were being treated in a local hospital.
The protesters gathered after Friday prayers when the party says unruly thugs burst in on the crowd, cursing and attacking with knives and sticks.
The party blames the security services for inadequate protection in Karak, about 60 miles (100 kilometers) south of Amman.
Repeated phone calls to the police were unanswered.
Jordan has experienced seven months of mostly peaceful protests demanding greater political say and economic reforms.