PHOENIX -- A collision sparked a road rage shooting that left a grandmother dead and her young granddaughter wounded Sunday afternoon, Phoenix police said.

The victim was identified on Monday as Elvina Legarde, 69. She was a passenger in the front seat of vehicle carrying four other people and suffered gunshot wounds to the upper part of her body, officers said. Legarde was rushed to the hospital in very critical condition, police said. She later died.

Her 4-year-old granddaughter who was in the back seat suffered a gunshot wound to the right arm, according to officers. Investigators said they were withholding the names of the other people in the vehicle.

Phoenix police said the incident began near 19th Avenue and Bethany Home Road with a minor collision between the Dodge Durango the five people were riding in and a White Ford Escort.

The two drivers got out and a verbal altercation ensued, police said.

The 21-year-old driver of the Escort then followed the Durango to 21st Avenue and Ocotillo Road, where the 26-year-old passenger in the Escort fired several shots into the SUV, police investigators said.

It wasn't immediately clear how police knew the ages of the people in the Escort.

The SUV ended up near 21st and Glendale avenues, where Michael Johnson said he stopped to help.

"We got out and I called 911 and I put my shirt over the little girl's arm," Johnson said.

Two other children, a 2-year-old girl and 7-year-old boy, were inside the Durango but neither of them was injured

One neighbor told CBS 5 News what the driver told her.

"She said that they pulled in front of them, they cut them off, and the people in the other car got mad," said Desiree Graham.

Police said they are looking for an older-model white Ford Escort.

People with information about the occupants of the Escort are urged to call Silent Witness at 480-WITNESS.

Graham said the incident has left her shaken.

"When I'm driving and I even tell my kids, 'Don't even look at people around you because you don't know if somebody might think you're giving them a dirty look or something and pull out a gun and start shooting you,'" Graham said.