At least five people have been injured, including a baby, after a car rammed into pedestrians in a busy street in Sydney, police told local media, adding that a woman is in serious condition. Police believe the driver of the car may have suffered a medical episode.

The incident reportedly took place near a restaurant on Victoria Street, Chatswood, a major business and residential district on the Lower North Shore of Sydney.

#BREAKING A car has hit pedestrians outside Chatswood mall in Sydney in what’s believed to have been a medical episode. More to come #7Newspic.twitter.com/x9n9R6av4r — 7News Yahoo7 (@Y7News) August 19, 2017

One woman in serious condition has been airlifted to nearby Royal North Shore Hospital, police said. Four other people, including a baby, were also taken to hospital.

“Their ages and conditions aren’t known,” New South Wales (NSW) police said in a statement on Facebook.

CHATSWOOD | Patients wheeled into ambulance as crowd watches on. Accident believed to be caused by medical episode @7NewsSydneypic.twitter.com/sdXNbKuFYq — Laura Banks (@laurakatebanks) August 19, 2017

“The car was coming through and lost control and then he hit about four people,” a witness told local 7 News. “I was so worried.”

“It [the car] went up the walkway then went past the shop, next to our shop and I think it crashed with a pram and a pair of grandparents,” another witness told the ABC.

Pedestrian possibly hit by car at Chatswood shopping centre pic.twitter.com/vZbU2wmEzY — Lily Cardis (@LilyCardis) August 19, 2017

The male driver remains at the scene of the incident, police said, adding that it looks like he didn’t deliberately ram into the crowd.

According to police, the driver “is believed to have suffered a medical episode.”

“The male driver of the vehicle remains at the scene where he is assisting police. The incident was not a deliberate act and it’s believed the man may have suffered a medical episode,” the statement added.

CHATSWOOD | Paramedics still in scene treating patients, multiple ambulance have just left scene @7NewsSydneypic.twitter.com/WN8cyfKYP2 — Laura Banks (@laurakatebanks) August 19, 2017

Police have set up an exclusion zone around the scene of the incident.