One person was killed and others injured late on Friday in a Palestinian refugee camp in south Lebanon after a dispute erupted into gunfire between rival political groups for the second time this week, Reuters witnesses and state media said.

The outbreak of violence comes after two men were shot dead in the same camp on Monday because of tensions between members of the mainstream Palestinian faction Fatah and a hardline Islamist group.

Fatah member Hussein Othman was killed in Friday's fighting between groups of armed men from rival factions, Lebanon's National News Agency said.

Gunfire erupted again Saturday morning after having died down during Friday night, a Reuters witness said.

Ain al-Hilweh camp, near the southern Lebanese coastal city of Sidon, has regularly seen factional disputes spiral into deadly violence.

Lebanon's Palestinian camps mainly fall outside the jurisdiction of the Lebanese security services.-Reuters