Jordan has identified the driver accused of carrying out the shooting at the Allenby (or King Hussein) Bridge, which killed two Israeli soldiers, as Abdel-Muttalib al-Qaisi.
He was a civilian who had begun working three months ago as a driver delivering aid to Gaza.
The Israeli army said in a statement that the attacker "was driving a humanitarian aid truck from Jordan, opened fire, and was then neutralised by security forces at the scene".
Israeli media quoted a security source as saying that the driver had been contracted by the Jordanian army to transport the truck.
He arrived from the Jordanian side of the Allenby Bridge and opened fire immediately upon arrival, before the vehicle was inspected.
Jordan's foreign ministry said authorities had launched "an investigation into the shooting incident that occurred this afternoon on the other side of the King Hussein Bridge, which Jordan condemns and rejects as a violation of the law and a threat to the kingdom’s interests and its ability to deliver humanitarian aid to Gaza".
In a Thursday evening statement, the Jordanian foreign ministry named the suspect while condemning "all acts of violence and rejecting all illegal actions that harm Jordan’s interests and role in delivering humanitarian aid to Gaza".
It added that the ministry was "following up, in coordination with all concerned agencies, on the situation of drivers who crossed the bridge today to deliver aid to Gaza to ensure their immediate return to Jordan".
The statement also called on Israel to stop its military campaign against Gaza immediately and to reach a permanent ceasefire, as well as to "launch an active and urgent diplomatic move to resolve the conflict on the basis of the two-state solution, protecting the entire region from the consequences of the dangerous escalation".
Following the attack, Jordanian security forces halted passenger movement through the Allenby Bridge crossing after Israel closed it from its side.
Jordan’s Public Security Directorate said: "Passenger movement across the King Hussein Bridge is suspended after its closure from the other side."
Who was al-Qaisi?
Images of Abdel-Muttalib al-Qaisi circulated on social media on Thursday. The Bani Qais tribe to which he belonged mourned him as "the heroic martyr Abdel-Muttalib al-Qaisi", in a post by the Supreme Council of Bani Qais Youth for Policy and Civil Society Development.
It said: "This operation is a response to Israeli arrogance and the massacres committed by the occupation against our brothers in beloved Palestine and its bullying against our nation."
According to local reports, al-Qaisi, known among drivers as "Abu Issa", was a father of three from Marj al-Hamam, al-Zuhur area, in Wadi al-Seer district southwest of Amman.
He had worked in freight transport for years before quitting three months ago to dedicate himself to delivering aid to Gaza via the Allenby Bridge crossing with the West Bank.
Jordanian authorities confirmed they had begun an investigation into the incident, for which no group has yet claimed responsibility. The attack took place at the only crossing allowing Palestinians from the occupied West Bank to exit to Jordan.
The Qaisi tribes in Jordan trace their origins to Qais Aylan and live across areas such as Madaba (Dhiban), Karak (al-Taybeh), Jerash, and Amman, particularly Wadi al-Seer.
The Israeli army said its chief of staff, Eyal Zamir, recommended halting the entry of humanitarian aid from Jordan "until the investigation is completed and the inspection procedures for Jordanian drivers are changed".
Aid deliveries would instead continue via other routes: Israel, Ashdod port, Kerem Shalom crossing, and Egypt.
Jordan’s foreign ministry said 22 Jordanian aid trucks crossed the bridge into Gaza on Thursday under agreed procedures, noting that 8,664 trucks in 201 convoys had entered since the start of Israel’s war.