JERUSALEM — A Palestinian Arab rammed a construction truck into three cars and a bus near the Jerusalem hotel where Senator Obama is supposed to stay today, injuring five people before an Israeli civilian shot and killed the attacker, police and witnesses said.

The attack was a chilling copycat of a similar incident earlier this month when another Palestinian Arab plowed his front loader into a string of vehicles and pedestrians on a busy Jerusalem street about three miles away. Three people were killed in that attack and dozens were wounded before an off-duty soldier shot and killed the assailant.

Both Palestinian Arabs were from east Jerusalem. The 208,000 Palestinian Arabs who live there are not Israeli citizens but carry Israeli ID cards that allow them freedom of movement throughout Israel, unlike West Bank Palestinian Arabs.

Police said in the latest attack, a civilian driving nearby saw what was happening, jumped out of the car and shot the driver. A border policeman who rushed to the scene also shot the driver. Police sealed off possible escape routes into predominantly Arab east Jerusalem and were searching for two suspects who fled, a police spokesman, Micky Rosenfeld, said.

The attacker struck a busy part of downtown Jerusalem, several hundred yards from the luxury King David hotel where Mr. Obama is scheduled to stay. The incident took place about seven hours before Mr. Obama was to arrive at Israel.

“I was driving on the main road when the (vehicle) hit me in the rear on the right hand side,” the bus driver, who was not identified, told Channel 10 TV. “After I passed him, he turned around, made a U-turn and rammed the windows twice with the shovel. The third time he aimed for my head, he came up to my window and I swerved to the right, otherwise I would have gone to meet my maker.”

Like the perpetrator of the previous attack, the driver in today’s incident was a Palestinian Arab from east Jerusalem with an Israeli residence permit and he drove the same type of front loader, police said. Israeli police called it a “terror attack” but no group immediately claimed responsibility.

A witness, Moshe Shimshi, said the Palestinian Arab driver, who was wearing a large, white skullcap commonly worn by religious Muslims, slammed into the side of the bus, then sped away and went for a car.

“He didn’t yell anything, he just kept ramming into cars,” Mr. Shimshi said.

Mr. Shimshi said he saw a man run toward the construction vehicle firing a pistol.

“After a few shots, I saw the driver shake and fall, and then he didn’t move any more.”

After. the Jerusalem police chief, Ilan Franco, said a border police officer arrived and shot at the driver “to make sure he was killed.” In the attack earlier this month, the driver of the construction vehicle was shot and presumed dead — only to revive and carry on with his attack before being shot dead.

Jerusalem’s mayor, Uri Lupolianski, was in the area when he heard a commotion and rushed over.

The attacker “is from east Jerusalem,” he said. “They keep on inventing ways to attack us,” he said. “Every work tool has become a weapon.”

The three latest attacks in Jerusalem have been carried out by Palestinian Arabs from the eastern sector of the city’s eastern sector, where they make up less than a third of the city’s population. Many east Jerusalem Palestinian Arabs work in construction in the Jewish parts of the city.