Al Jazeera English on Instagram: "UNRWA chief Philippe Lazzarini says it is not clear if a polio vaccine campaign will go ahead in northern Gaza tomorrow, after Israeli forces detained and threatened #UN staff on their way to begin the rollout.⁠ .⁠ “The convoy was stopped at gun point just after the Wadi Gaza checkpoint with threats to detain UN staff,” Lazzarini said, in a post on X, adding that “heavy damage was caused by bulldozers to the UN armoured vehicles.”⁠ .⁠ Palestinian and international staff travelling with the convoy were detained for more than eight hours but have now been released and are safely back at the UN base, he added.⁠ .⁠ Earlier, the Israeli army said in a brief statement it was detaining a UN convoy to question “Palestinian suspects” and claimed the convoy was not transporting #polio vaccines.⁠ .⁠ 🔗Tap the link in bio for 🔴 LIVE updates.⁠ .⁠ #Israel_Gaza_War"