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PHILADELPHIA (CBS) — Philadelphia police are investigating after a man was shot to death overnight while sitting in his truck in Olney.

Two people found the 36-year-old man slumped over in his vehicle at 3 a.m. Saturday, according to officials.

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An investigation is underway as police try to figure out what happened leading up to the shooting.

So far, the evidence does indicate that the suspect fired at least 16 shots through the passenger side of the car.

“It appears that the driver who was found with his foot on the brake of the car, the truck was in drive. He was stopped possibly in front of him, a car was stopped possibly in front of him,” explained Capt. George Fuchs of the Philadelphia Police Department.

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“And whoever came up, they came up on his passenger side – shot right through the passenger side, struck him multiple times. And the momentum of the round through, across the street, through the truck, and into the house. There’s all kinds of fragments, projectiles across the street,” Fuchs stated.

The victim suffered multiple gunshot wounds to the head, neck, and arms.

Most of the bullets struck the victim and his pickup, but some stray bullets did hit another nearby vehicle.

Six bullets struck a house where one adult and a child were sleeping.

No one in the house was hurt, but people who live along this street in Olney say this shooting further harms their sense of security here.

“It scares me to have my grandchildren here,” said resident Wallace Coward. “My children are grown, but my grandchildren come here and most of the time I keep them in the house for safety.”

Police believe the deadly shooting was sparked by an argument between one or two men and the man killed, all while they were stopped in traffic.

Officials also believe the shooter fled the scene in a vehicle.

They are asking anyone with information on that vehicle or information on the shooter to please come forward.