Forces loyal to Libyan ruled Muammar Gaddafi have reportedly imposed a siege on the small town of Qusbat, which is held by the rebel fighters, Press TV reported.
The fighters said on Saturday that Gaddafi loyalists have cut electricity and communications in the town.
Qusbat is cut off from other revolutionary positions in western Libya. It is 70 kilometers from their nearest positions in Zlitan.
Libya has been the scene of intense fighting between government troops and rebel forces since mid-February.
The bloody conflict has left thousands of people dead and many others wounded.
Rebel forces want an end to Gaddafi's decades-long rule.