A Palestinian security source in Nablus told Ynet that the explosion may have taken place as explosives were planted by Fatah members planning to detonate the vehicle near an IDF force which will enter the city.
The IDF Spokesperson's Office said that the Israeli army had nothing to do with the incident.
The Palestinians reported that the vehicle belonged to Sufian Kendil, a senior member of Fatah's military wing, the al-Aqsa Martyrs' Brigades. According to the report, Kendil survived the explosion and the people killed were bystanders.
Al-Aqsa Brigades officials said that the IDF had launched a harsh offensive against the organization in Nablus in the past few days, hitting and arresting and number of prominent group members.
Al-Aqsa's spokesman in the Nablus area said that the IDF was planning an assassination of all the organization's members, and that in light of the situation the organization would consider responding in spite of its commitment to maintain the ceasefire.