NEW YORK (CBSNewYork) – Investigators are looking into whether a driver involved in a deadly car crash in Queens Wednesday evening was speeding.

A mother and a child were killed and four others were injured in the accident.

It took place at 210th Street near the Horace Harding Expressway just after 6 p.m., when a white SUV crashed into a silver Toyota Camry.

Suzanna Ha, 47, and her 10-year-old daughter Angelica Ung were killed in the crash. Ung’s grandfather, grandmother and a second child also in the Camry survived. They remain hospitalized.

Wei Chen and her mother called 911 when they heard the accident from a nearby playground.

“All of the sudden, I heard, like, tires screeching, and then all of the sudden I see, like, smoke, and like, dust, like, car parts, like, flying into the air,” Chen said.

Police say the driver of the white SUV was speeding, crossed the double yellow line and then jumped the sidewalk. The SUV was left with its front end smashed, and it took down what looked to be part of a tree.

Dr. Alex Kozos heard the crash from inside his home and rushed to the scene to help.

“They were strapped in with the seatbelts,” he said. “I had to cut the seatbelts off of them.”

Witnesses said the grandfather who had been driving was in shock.

“He was barely conscious, because he was bleeding from his head, but then he didn’t know what happened,” said neighbor Robin Han.

Both cars were so severely damaged that neighbors wondered how such an accident could have happened – in a 15 mph school zone with a speed bump in the middle of the street.

“I know a lot of people, once they come down this street, they’re, you know, getting ready to get on the highway so they’re typically driving a little bit quicker,” said neighbor Jesse Leibowitz.

There have been no arrests so far. The accident remains under investigation.