Hundreds of Palestinians marched through the West Bank city of Ramallah on Tuesday to mark the 55th anniversary of the Fatah movement led by President Mahmoud Abbas.
Established by Yasser Arafat in 1965, Fatah led the armed struggle against Israel for decades as the main component of the Palestine Liberation Organization.
The popularity of Abbas, and by extension Fatah, has plunged in recent years as he has failed to achieve an independent state or heal the rift with Hamas.
Many Palestinians also accuse the Fatah-led Palestinian Authority of rampant corruption.
The PLO recognized Israel in the early 1990s at the start of the peace process, and since then it has been committed to a two-state solution.
Around a dozen masked men led the march through Ramallah, firing several rounds of gunfire into the air.
Similar marches are planned elsewhere in the West Bank in the coming days.
Fatah has long vied with the terror group Hamas for leadership of the Palestinian national struggle.
In 2007, the two factions battled one another in Gaza, leading to a violent Hamas takeover of the coastal strip. Numerous attempts at reconciliation over the past 12 years have failed.
The peace process with Israel ground to a halt over a decade ago, leaving the Fatah-led Palestinian Authority with limited control over parts of the West Bank but little hope of achieving an independent state anytime soon.
Israel captured the West Bank, Gaza and East Jerusalem in the 1967 Six-Day War. The Palestinian Authority wants all three territories to form a future state living alongside Israel.
Prime Minister Benjamin Netanyahu has recently vowed to annex large parts of the West Bank, which would make it virtually impossible to establish a viable Palestinian state.