An Israeli court has sentenced Marwan Barghouthi to five consecutive life terms in prison on murder convictions.
The Palestinian uprising leader is widely seen as a potential successor to Yasser Arafat.
Mr Barghouthi, 45, denied involvement in ambushes by militants from his Fatah faction that killed five people.
A Palestinian lawmaker, he refused to recognise the jurisdiction of the Tel Aviv court that convicted him on murder charges last month.