JERUSALEM — Remains of Yasser Arafat, the longtime Palestinian leader who died in 2004, were exhumed from his tomb in the West Bank city of Ramallah on Tuesday as part of an inquiry into whether he might have been poisoned, Palestinian officials said.

The investigation was ordered after a report on al-Jazeera in July presented what it said was evidence of possible poisoning, reviving suspicions surrounding Arafat’s death.