Israel’s prime minister on Tuesday expressed sorrow over the fatal shooting of a Jordanian judge and announced a joint investigation into the incident, seeking to ease tensions with its key Arab ally.

The death of Raed Zueter, a Jordanian magistrate of Palestinian descent, has caused an uproar in Jordan, triggering street protests and calls in parliament to annul the 1994 peace agreement with Israel.

The Israeli military said that guards shot Zueter on Monday after he tried to grab a rifle from a soldier at the border crossing between the West Bank and Jordan. Zueter, who is originally from the West Bank city of Nablus, had been visiting relatives there and was on his way back to Jordan at the time.

In Nablus, about 1,000 people attended Zueter’s funeral. The Palestinian Authority escorted the body in a 20-vehicle military procession. As the convoy snaked through the streets, mourners shouted and chanted anti-—Israel slogans.

In a statement, Prime Minister Benjamin Netanyahu’s office said, “Israel regrets the death of Judge Raed Zueter... and expresses its sympathies to the people and government of Jordan.”

It said Israel had shared the results of its preliminary investigation with Jordan, and agreed to a Jordanian request to establish a joint investigation immediately.

In Amman, the Jordanian parliament discussed the killing on Tuesday. Prime Minister Abdullah Ensour said the government condemned the killing and said that Israel had apologized.

Lawmakers mocked and dismissed the Israeli gesture, and the parliament speaker, Attef al-Tarwaneh, said the shooting was a violation of the peace treaty. During the discussion, a spectator was escorted outside of the building after trying to set fire to an Israeli flag.

Dozens of protesters gathered outside the parliament afternoon for a second day of protests against Israel. Meanwhile, hundreds of lawyers and judges staged a one-day strike, calling on Jordan to deport the Israeli ambassador and cancel the peace treaty.

About 150 angry Jordanian protesters gathered on Monday near the Israeli Embassy to condemn the killing. Security forces dispersed the demonstration after protesters tried to attack the embassy.

A mass protest against Israel is expected after Friday noon prayers organized by opposition parties.

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