By John McDevitt and Oren Liebermann

PHILADELPHIA (CBS) - A 23-year-old man has succumbed to his injuries after he was attacked in Old City early Saturday morning, according to Philadelphia Police.

Police say 23-year-old Kevin Kless was walking along Chestnut Street near 4th Street around 2:30 Saturday morning when he got into a small argument with a cab driver.

Shortly thereafter, authorities say, four men inside a car behind the taxi got involved in an argument with the victim.

Police say of the four men, who were described as Middle Eastern, three got out of the four-door, maroon Mazda 626, believed to be a 2000-2003 model, and started to beat Kless.

(UPDATE:  Police said later they were not certain of the descriptions of the car or its occupants and were encouraging anyone who witnessed anything to contact them, even if it does not conform to the initial information.)

Kless was taken to Jefferson University Hospital in extremely critical condition and died a little after 7pm, according to police.

Devastated, the victim’s father is asking for the public’s help.

“I need anyone that was in the area at the time to please call the police,” John Kless said. “I’m completely numb; I can’t say another word, I can’t cry anymore.”

Kless’s parents say they are going to donate his organs to help save the lives of others.

Meanwhile, witnesses are being asked to call Homicide Detectives at 215-686-3334.

Investigators are also looking at surveillance tape from the area.