Abd Allah Shraidi, who headed the Osbat al-Nour group, died at dawn. He had been badly wounded in mid-May in an attack by gunmen from Palestinian President Yasser Arafat’s Fatah movement.

Shraidi’s faction is a splinter of Osbat al-Ansar, a group described as “terrorist” by the US State Department and suspected of links with al-Qaeda.

The attempt on Shraidi’s life in May, which killed one of his bodyguards and a bystander, sparked a three-day gunfight in the camp between Fatah, Osbat al-Nour and Osbat al-Ansar, which left 10 people dead and another 30 injured.

In May, Fatah representative in Lebanon Sultan Abu al-Aynain had said he wanted Shraidi eliminated in revenge for the deaths of several Fatah members.

A group calling itself Jamaat al-Nour threatened to eliminate “anyone who had a hand in the assassination” of Shraidi, “notably the traitors Sultan Abu al-Aynain and Munir Maqdah,” the Fatah chief in the camp.

Ain al-Helwah is one of the biggest of Lebanon’s 11 Palestinian refugee camps across the country. It falls outside the control of the Lebanese army and hosts a number of armed groups.